Undifferentiated Symptoms — MCQs

Q: A 48-year-old woman presents with a 16-week history of severe fatigue, widespread pain, and 4kg weight loss. She scores 7/10 on a pain scale and reports poor sleep with frequent waking. Examination shows multiple tender points on palpation but no synovitis or muscle weakness. Blood tests show: Hb 118 g/L, WCC 6.2 × 10⁹/L, ESR 8 mm/hr, CRP 3 mg/L, TSH 2.4 mU/L, calcium 2.38 mmol/L, vitamin D 28 nmol/L. She meets fibromyalgia diagnostic criteria. What feature most strongly suggests an alternative or additional diagnosis requires investigation?

The presence of unintentional weight loss. ***The presence of unintentional weight loss*** - Significant **unintentional weight loss** is a clinical "red flag" that is not typical of **fibromyalgia** and necessitates investigation for malignancy, chronic infection, or metabolic disorders. - While the patient meets the **ACR criteria** for fibromyalgia, systemic symptoms like weight loss and anemic trends (Hb 118 g/L) suggest an underlying organic pathology. *The elevated ESR relative to normal CRP* - An **ESR of 8 mm/hr** is within the normal reference range, and it is concordant with a **CRP of 3 mg/L**, supporting a non-inflammatory condition. - In **fibromyalgia**, inflammatory markers are characteristically normal, differentiating it from inflammatory conditions like **polymyalgia rheumatica** or **rheumatoid arthritis**. *The vitamin D insufficiency* - A **Vitamin D level of 28 nmol/L** represents insufficiency, which is common in the general population and can exacerbate **musculoskeletal pain**. - While it requires supplementation, **vitamin D insufficiency** is a frequent finding in pain clinics and does not explain the more concerning "red flag" symptom of **unintentional weight loss**. *The severity of fatigue and sleep disturbance* - Severe **fatigue** and **non-restorative sleep** are cardinal, defining features of **fibromyalgia** and are part of the core diagnostic criteria. - These symptoms help confirm the **fibromyalgia diagnosis** rather than suggesting a need for alternative investigations for a different underlying condition. *The widespread pain with multiple tender points* - **Widespread pain** lasting more than 3 months and the presence of **multiple tender points** on palpation are classic clinical markers of **fibromyalgia**. - The absence of **synovitis** or swelling on examination further points away from inflammatory arthritis and toward a central pain sensitization syndrome.

Understanding the concept of 'diagnostic uncertainty' in managing undifferentiated symptoms in primary care involves recognizing that certain presentations cannot be immediately diagnosed. Which of the following statements best describes the evidence-based approach to managing diagnostic uncertainty?

A 35-year-old woman presents with a 10-week history of severe fatigue, aching limbs, and subjective fever. She works as a veterinary nurse. She reports a flu-like illness that never fully resolved. Examination shows temperature 37.8°C, no rash or lymphadenopathy. Blood tests show: Hb 128 g/L, WCC 3.8 × 10⁹/L (lymphocytes 1.2 × 10⁹/L), platelets 156 × 10⁹/L, CRP 12 mg/L, ALT 124 U/L, AST 96 U/L. Blood film shows atypical lymphocytes. Monospot test is negative. What is the most appropriate next investigation?

A 66-year-old man with a 15-week history of fatigue and 8kg weight loss has been investigated extensively in primary care. Blood tests including FBC, U&E, LFT, TFT, calcium, glucose, CRP, and PSA are normal. Chest X-ray and abdominal ultrasound are unremarkable. He has no specific symptoms beyond fatigue and weight loss. His appetite is reduced but he has no dysphagia. He is a lifelong non-smoker. What is the most appropriate next step in management?

A 41-year-old woman presents with a 15-week history of fatigue and 5kg weight loss. She reports heat intolerance and palpitations. Her grandmother had 'thyroid problems'. Examination shows pulse 96 bpm regular, BP 138/72 mmHg, fine tremor, and a smooth thyroid gland enlarged to twice normal size with an audible bruit. Blood tests show: TSH <0.01 mU/L, free T4 42 pmol/L, free T3 12.8 pmol/L. TSH receptor antibodies are strongly positive. What is the most important counselling point before initiating definitive treatment?

A 62-year-old man presents with an 11-week history of intermittent fevers up to 38.6°C, night sweats, and 7kg weight loss. He has a 35-year history of Crohn's disease managed with adalimumab. Examination shows temperature 38.2°C, no lymphadenopathy, chest clear, abdomen soft with no masses. Blood tests show: Hb 102 g/L, WCC 11.2 × 10⁹/L, neutrophils 8.4 × 10⁹/L, CRP 78 mg/L. Chest X-ray is normal. Three sets of blood cultures are negative. What is the most appropriate next investigation?

According to NICE guidelines on assessing patients with chronic pain in primary care, which of the following approaches represents best practice for comprehensive pain assessment?

A 48-year-old woman presents with a 16-week history of severe fatigue, widespread pain, and 4kg weight loss. She scores 7/10 on a pain scale and reports poor sleep with frequent waking. Examination shows multiple tender points on palpation but no synovitis or muscle weakness. Blood tests show: Hb 118 g/L, WCC 6.2 × 10⁹/L, ESR 8 mm/hr, CRP 3 mg/L, TSH 2.4 mU/L, calcium 2.38 mmol/L, vitamin D 28 nmol/L. She meets fibromyalgia diagnostic criteria. What feature most strongly suggests an alternative or additional diagnosis requires investigation?

A 39-year-old man presents with a 12-week history of fever occurring every 48 hours, peaking at 39.5°C, with associated rigors and sweating. Between episodes he feels completely well. He returned from a 6-month work assignment in Nigeria 10 months ago. He took malaria prophylaxis irregularly. Examination during a febrile episode shows temperature 39.4°C, pulse 108 bpm, BP 126/78 mmHg, mild splenomegaly. Three blood films taken during afebrile periods were negative for malaria parasites. What is the most appropriate next step?

A 57-year-old woman presents with a 13-week history of fatigue and 6kg weight loss. She has developed a sensation of fullness after small meals. Her only medication is levothyroxine 100mcg for hypothyroidism. Examination reveals a palpable spleen 4cm below the left costal margin. Blood tests show: Hb 142 g/L, WCC 68 × 10⁹/L (neutrophils 52 × 10⁹/L, lymphocytes 4 × 10⁹/L, eosinophils 3 × 10⁹/L, basophils 5 × 10⁹/L, myelocytes 4 × 10⁹/L), platelets 528 × 10⁹/L. Blood film shows a full spectrum of myeloid cells. What is the most appropriate immediate management?

Q10

A 53-year-old woman presents with a 14-week history of progressive fatigue, 8kg weight loss, and intermittent abdominal discomfort. She has a history of coeliac disease diagnosed 12 years ago and reports good dietary compliance. Examination shows conjunctival pallor and mild generalised lymphadenopathy with 1cm nodes in cervical and axillary regions. Blood tests show: Hb 94 g/L, MCV 78 fL, WCC 3.2 × 10⁹/L, platelets 142 × 10⁹/L, ferritin 8 μg/L, tissue transglutaminase IgA antibodies negative, IgA level normal. What is the most likely diagnosis?

Undifferentiated Symptoms UK Medical PG Practice Questions and MCQs

Question 1: Understanding the concept of 'diagnostic uncertainty' in managing undifferentiated symptoms in primary care involves recognizing that certain presentations cannot be immediately diagnosed. Which of the following statements best describes the evidence-based approach to managing diagnostic uncertainty?

A. Immediate referral to secondary care is always appropriate when a diagnosis cannot be made in primary care to ensure patient safety
B. Safety-netting with clear instructions for re-consultation if symptoms persist, worsen, or new features develop is an essential component of managing uncertainty (Correct Answer)
C. Extensive investigation should be undertaken immediately to exclude all possible serious diagnoses before adopting a watch-and-wait approach
D. Patients should be reassured that the absence of abnormal findings on initial tests means serious pathology is excluded and no follow-up is needed
E. Empirical treatment should be started for the most likely diagnosis to avoid delays in management

Explanation: ***Safety-netting with clear instructions for re-consultation if symptoms persist, worsen, or new features develop is an essential component of managing uncertainty***- **Safety-netting** is an evidence-based strategy that allows for the management of **undifferentiated symptoms** by providing patients with clear, specific **red-flag symptoms** and a planned follow-up.- This approach maintains **patient safety** and utilizes the clinical tool of **time as a diagnostic test**, permitting the natural history of a condition to reveal itself without unnecessary harm.*Immediate referral to secondary care is always appropriate when a diagnosis cannot be made in primary care to ensure patient safety*- Primary care clinicians frequently manage **low-prevalence conditions** where immediate referral would lead to **over-medicalization** and unnecessary patient anxiety.- Most undifferentiated symptoms in primary care are **self-limiting** or benign, making immediate specialist referral an inefficient and potentially harmful use of resources.*Extensive investigation should be undertaken immediately to exclude all possible serious diagnoses before adopting a watch-and-wait approach*- Over-investigation increases the risk of **false positives** and **incidentalomas**, which may lead to invasive procedures that cause more harm than the original symptom.- A **judicious use of investigations** is preferred to avoid the cascades of care that arise from testing without sufficient clinical suspicion.*Patients should be reassured that the absence of abnormal findings on initial tests means serious pathology is excluded and no follow-up is needed*- Many serious conditions can present with **normal initial tests** because some pathologies only become detectable as the disease progresses over time.- Providing false reassurance without a plan for **re-evaluation** violates the principles of safety-netting and may lead to **delayed diagnoses** if symptoms evolve.*Empirical treatment should be started for the most likely diagnosis to avoid delays in management*- Initiating treatment without a diagnosis can **mask symptoms**, making it significantly more difficult to reach a definitive diagnosis later.- This approach exposes patients to potential **adverse drug reactions** and side effects that are unnecessary if the underlying cause is a self-limiting viral illness.

Question 2: A 35-year-old woman presents with a 10-week history of severe fatigue, aching limbs, and subjective fever. She works as a veterinary nurse. She reports a flu-like illness that never fully resolved. Examination shows temperature 37.8°C, no rash or lymphadenopathy. Blood tests show: Hb 128 g/L, WCC 3.8 × 10⁹/L (lymphocytes 1.2 × 10⁹/L), platelets 156 × 10⁹/L, CRP 12 mg/L, ALT 124 U/L, AST 96 U/L. Blood film shows atypical lymphocytes. Monospot test is negative. What is the most appropriate next investigation?

A. Serology for Coxiella burnetii (Q fever) (Correct Answer)
B. HIV antibody and antigen test
C. EBV serology (IgM and IgG)
D. CMV serology (IgM and IgG)
E. Toxoplasma serology

Explanation: ***Serology for Coxiella burnetii (Q fever)*** - This patient's occupation as a **veterinary nurse** provides significant exposure to **Coxiella burnetii**, which is commonly found in livestock and birthed animals. - The clinical picture of **prolonged flu-like illness**, **fever**, **fatigue**, **hepatitis** (elevated ALT/AST), and **atypical lymphocytes** is highly characteristic of **acute Q fever**, especially with a negative Monospot test. *HIV antibody and antigen test* - While **acute HIV seroconversion** can present with a mononucleosis-like syndrome, symptoms typically resolve within 2-4 weeks, not persist for **10 weeks**. - The **occupational history** of a veterinary nurse strongly points towards a zoonotic infection, making HIV a less specific initial investigation in this context. *EBV serology (IgM and IgG)* - Although **Epstein-Barr virus (EBV)** can cause atypical lymphocytes and hepatitis, the **Monospot test was negative**, making acute infectious mononucleosis due to EBV less likely. - The specific **occupational exposure** to animals makes **Q fever** a more probable diagnosis than typical infectious mononucleosis given the overall presentation. *CMV serology (IgM and IgG)* - **Cytomegalovirus (CMV)** can cause a Monospot-negative mononucleosis syndrome with fever, fatigue, and hepatitis. - However, the patient's **veterinary nurse** profession makes **Q fever** a higher priority in the differential diagnosis due to direct zoonotic exposure, though CMV should be considered if initial tests are negative. *Toxoplasma serology* - **Toxoplasmosis** typically presents with **lymphadenopathy** and flu-like symptoms, which are not prominent features in this case (**no lymphadenopathy**). - While exposure is possible in this occupation, the characteristic combination of **prolonged fever**, **hepatitis**, and **atypical lymphocytes** without significant lymphadenopathy is less suggestive of toxoplasmosis and more aligned with Q fever.

Question 3: A 66-year-old man with a 15-week history of fatigue and 8kg weight loss has been investigated extensively in primary care. Blood tests including FBC, U&E, LFT, TFT, calcium, glucose, CRP, and PSA are normal. Chest X-ray and abdominal ultrasound are unremarkable. He has no specific symptoms beyond fatigue and weight loss. His appetite is reduced but he has no dysphagia. He is a lifelong non-smoker. What is the most appropriate next step in management?

A. Arrange colonoscopy under routine pathway as he is >60 years
B. Arrange urgent upper GI endoscopy under 2-week wait pathway
C. Request CT chest, abdomen and pelvis with contrast (Correct Answer)
D. Refer to general surgery under 2-week wait for further assessment
E. Reassure and arrange review in 4 weeks with repeat blood tests

Explanation: ***Request CT chest, abdomen and pelvis with contrast*** - In a patient over **60 years** with significant **unexplained weight loss** and fatigue, a **CT scan** is the gold-standard investigation to screen for occult malignancy across multiple organ systems. - This approach is recommended when initial primary care screens, including **blood tests**, **CXR**, and **ultrasound**, have failed to reveal a clear diagnosis. *Arrange colonoscopy under routine pathway as he is >60 years* - **Colonoscopy** is generally reserved for patients presenting with **lower GI symptoms**, such as altered bowel habits or rectal bleeding, or unexplained **iron deficiency anemia**. - A **routine pathway** is inappropriate given the significant **8kg weight loss**, which necessitates an urgent investigation for potential malignancy. *Arrange urgent upper GI endoscopy under 2-week wait pathway* - **Upper GI endoscopy** is indicated for suspected gastric or esophageal cancer when specific symptoms like **dysphagia**, persistent vomiting, or new-onset dyspepsia are present. - While the patient has a reduced appetite, the lack of localized **GI symptoms** makes a broad imaging approach like CT more appropriate than an invasive localized procedure. *Refer to general surgery under 2-week wait for further assessment* - A **general surgical referral** is premature without a localized finding or a suspected site-specific diagnosis to guide management. - **Cross-sectional imaging** should be performed first to identify the primary pathology, which will then determine the most relevant **specialist referral**. *Reassure and arrange review in 4 weeks with repeat blood tests* - Clinical **reassurance** is unsafe in an elderly patient with **unintentional weight loss** exceeding 5% of their body weight, regardless of normal initial blood tests. - Delaying further investigation by 4 weeks could lead to a **delayed diagnosis** of an underlying malignancy that requires urgent intervention.

Question 4: A 41-year-old woman presents with a 15-week history of fatigue and 5kg weight loss. She reports heat intolerance and palpitations. Her grandmother had 'thyroid problems'. Examination shows pulse 96 bpm regular, BP 138/72 mmHg, fine tremor, and a smooth thyroid gland enlarged to twice normal size with an audible bruit. Blood tests show: TSH <0.01 mU/L, free T4 42 pmol/L, free T3 12.8 pmol/L. TSH receptor antibodies are strongly positive. What is the most important counselling point before initiating definitive treatment?

A. Carbimazole may cause agranulocytosis and she should seek urgent medical attention if she develops a sore throat or fever
B. Radioiodine treatment is contraindicated in women of childbearing age due to long-term fertility effects
C. She must use reliable contraception and avoid pregnancy during and for 6 months after radioiodine treatment (Correct Answer)
D. Thyroid surgery carries a high risk of recurrent laryngeal nerve damage causing permanent voice changes
E. Propranolol should not be used if she has a history of asthma or COPD

Explanation: ***She must use reliable contraception and avoid pregnancy during and for 6 months after radioiodine treatment*** - **Radioiodine (I-131)** is a common **definitive treatment** for Graves' disease, but is strictly **contraindicated during pregnancy** as it crosses the placenta and can destroy the fetal thyroid gland. - Women must be counselled to avoid pregnancy for at least **6 months** post-treatment to ensure the radioactive isotope has cleared and thyroid status is stable, making this the most important counselling point for a woman of childbearing age. *Carbimazole may cause agranulocytosis and she should seek urgent medical attention if she develops a sore throat or fever* - While **agranulocytosis** is a severe side effect of **antithyroid drugs (ATDs)** like carbimazole, these are typically used for medical management rather than considered a "definitive" therapy like surgery or radioiodine. - Patients on carbimazole must be warned to report **fever or sore throat** immediately for a full blood count, but this is not counselling for definitive treatment. *Radioiodine treatment is contraindicated in women of childbearing age due to long-term fertility effects* - Radioiodine is **not contraindicated** in women of childbearing age; it is only strictly contraindicated in those who are **currently pregnant or breastfeeding**. - There is no evidence that radioiodine causes **long-term infertility** or an increased risk of congenital malformations in future pregnancies conceived after the recommended wait period. *Thyroid surgery carries a high risk of recurrent laryngeal nerve damage causing permanent voice changes* - While **recurrent laryngeal nerve injury** is a recognized complication of thyroidectomy (a definitive treatment), the risk is generally **low (1-2%)** when performed by experienced surgeons, not a "high risk." - Although important to mention, the absolute contraindication of pregnancy with **radioiodine** represents a more critical safety counselling point for a woman of childbearing potential. *Propranolol should not be used if she has a history of asthma or COPD* - This is a standard contraindication for **non-selective beta-blockers** such as propranolol, which are used for **symptomatic relief** of hyperthyroid symptoms like palpitations and tremor. - However, this counselling point does not pertain to the **definitive treatment** (radioiodine or surgery) aimed at curing the underlying hyperthyroidism.

Question 5: A 62-year-old man presents with an 11-week history of intermittent fevers up to 38.6°C, night sweats, and 7kg weight loss. He has a 35-year history of Crohn's disease managed with adalimumab. Examination shows temperature 38.2°C, no lymphadenopathy, chest clear, abdomen soft with no masses. Blood tests show: Hb 102 g/L, WCC 11.2 × 10⁹/L, neutrophils 8.4 × 10⁹/L, CRP 78 mg/L. Chest X-ray is normal. Three sets of blood cultures are negative. What is the most appropriate next investigation?

A. CT chest, abdomen and pelvis with contrast (Correct Answer)
B. Colonoscopy with multiple biopsies
C. Faecal calprotectin and Crohn's disease activity index
D. Interferon-gamma release assay (IGRA) for tuberculosis
E. Transthoracic echocardiography

Explanation: ***CT chest, abdomen and pelvis with contrast***- This patient presents with signs of **Fever of Unknown Origin (FUO)** and constitutional symptoms; **CT imaging** is the gold-standard next step to screen for occult infection, abscesses, or malignancy.- Patients on **anti-TNF therapy (adalimumab)** are at increased risk for **lymphoma** and opportunistic infections, making comprehensive cross-sectional imaging vital to visualize both intestinal and extra-intestinal pathology.*Colonoscopy with multiple biopsies*- While useful for assessing **Crohn's disease activity**, it cannot detect extra-luminal complications like **intra-abdominal abscesses** or systemic processes that CT can identify.- The systemic nature of the symptoms (high fever, weight loss) suggests a need for broader imaging before invasive luminal assessment.*Faecal calprotectin and Crohn's disease activity index*- These are primarily used to monitor **luminal inflammation** and disease severity but lack the sensitivity to diagnose **extraintestinal malignancy** or deep-seated infections.- A high **CRP** and significant weight loss in an immunosuppressed patient require more definitive diagnostic imaging than stool biomarkers.*Interferon-gamma release assay (IGRA) for tuberculosis*- **IGRA** is used to screen for **latent TB**, but it cannot distinguish between latent and active disease, nor can it identify extrapulmonary or disseminated TB.- Patients on **adalimumab** may have active TB despite a **normal chest X-ray**, necessitating CT for better visualization of lymphadenopathy or miliary patterns.*Transthoracic echocardiography*- This is used to investigate **infective endocarditis**; however, three sets of negative **blood cultures** and the absence of a new murmur make this a lower diagnostic priority.- Given the history of Crohn's and biologic use, searching for **intra-abdominal complications** or **malignancy** via CT is a more clinically relevant next step.

Question 6: According to NICE guidelines on assessing patients with chronic pain in primary care, which of the following approaches represents best practice for comprehensive pain assessment?

A. Focusing assessment primarily on pain intensity using a numeric rating scale, as this is the most objective measure
B. Using a biopsychosocial approach that assesses pain intensity, physical function, psychological wellbeing, and social factors (Correct Answer)
C. Prioritizing identification of underlying pathology through imaging and specialist referral before addressing symptom management
D. Assessing pain characteristics and response to analgesia, deferring psychosocial assessment to secondary care
E. Emphasizing patient expectations for cure and setting goals for complete pain resolution

Explanation: ***Using a biopsychosocial approach that assesses pain intensity, physical function, psychological wellbeing, and social factors*** - **NICE guidelines** advocate for a **biopsychosocial model** in chronic pain assessment, recognizing the interplay of biological, psychological, and social factors. - This comprehensive approach allows for a holistic understanding of the patient's pain experience, including its impact on **function** and **quality of life**, guiding tailored management plans. *Focusing assessment primarily on pain intensity using a numeric rating scale, as this is the most objective measure* - While pain intensity scales are useful, relying solely on them provides an incomplete picture and neglects the **subjective nature** and **multifaceted impact** of chronic pain. - A numeric rating scale does not capture how pain affects a patient's **daily activities**, mood, or social interactions, which are crucial for effective management. *Prioritizing identification of underlying pathology through imaging and specialist referral before addressing symptom management* - In **chronic primary pain**, imaging often reveals findings that are not directly correlated with the patient's symptoms and may lead to **unnecessary investigations** or interventions. - NICE guidelines emphasize that early intervention should focus on symptom management and improving **function**, rather than delaying care by exhaustively searching for structural pathology. *Assessing pain characteristics and response to analgesia, deferring psychosocial assessment to secondary care* - **Psychosocial factors** are significant contributors to the persistence and disability associated with chronic pain, and their early assessment is critical in **primary care**. - Deferring this to secondary care can delay appropriate holistic management and miss opportunities for early intervention in addressing **"yellow flags"** for poor prognosis. *Emphasizing patient expectations for cure and setting goals for complete pain resolution* - Setting expectations for **complete pain resolution** in chronic conditions is often unrealistic and can lead to patient dissatisfaction, frustration, and a sense of treatment failure. - Best practice involves helping patients set **realistic goals** focused on improving function, managing pain, and enhancing their **quality of life**, rather than eliminating pain entirely.

Question 7: A 48-year-old woman presents with a 16-week history of severe fatigue, widespread pain, and 4kg weight loss. She scores 7/10 on a pain scale and reports poor sleep with frequent waking. Examination shows multiple tender points on palpation but no synovitis or muscle weakness. Blood tests show: Hb 118 g/L, WCC 6.2 × 10⁹/L, ESR 8 mm/hr, CRP 3 mg/L, TSH 2.4 mU/L, calcium 2.38 mmol/L, vitamin D 28 nmol/L. She meets fibromyalgia diagnostic criteria. What feature most strongly suggests an alternative or additional diagnosis requires investigation?

A. The presence of unintentional weight loss (Correct Answer)
B. The elevated ESR relative to normal CRP
C. The vitamin D insufficiency
D. The severity of fatigue and sleep disturbance
E. The widespread pain with multiple tender points

Explanation: ***The presence of unintentional weight loss*** - Significant **unintentional weight loss** is a clinical "red flag" that is not typical of **fibromyalgia** and necessitates investigation for malignancy, chronic infection, or metabolic disorders. - While the patient meets the **ACR criteria** for fibromyalgia, systemic symptoms like weight loss and anemic trends (Hb 118 g/L) suggest an underlying organic pathology. *The elevated ESR relative to normal CRP* - An **ESR of 8 mm/hr** is within the normal reference range, and it is concordant with a **CRP of 3 mg/L**, supporting a non-inflammatory condition. - In **fibromyalgia**, inflammatory markers are characteristically normal, differentiating it from inflammatory conditions like **polymyalgia rheumatica** or **rheumatoid arthritis**. *The vitamin D insufficiency* - A **Vitamin D level of 28 nmol/L** represents insufficiency, which is common in the general population and can exacerbate **musculoskeletal pain**. - While it requires supplementation, **vitamin D insufficiency** is a frequent finding in pain clinics and does not explain the more concerning "red flag" symptom of **unintentional weight loss**. *The severity of fatigue and sleep disturbance* - Severe **fatigue** and **non-restorative sleep** are cardinal, defining features of **fibromyalgia** and are part of the core diagnostic criteria. - These symptoms help confirm the **fibromyalgia diagnosis** rather than suggesting a need for alternative investigations for a different underlying condition. *The widespread pain with multiple tender points* - **Widespread pain** lasting more than 3 months and the presence of **multiple tender points** on palpation are classic clinical markers of **fibromyalgia**. - The absence of **synovitis** or swelling on examination further points away from inflammatory arthritis and toward a central pain sensitization syndrome.

Question 8: A 39-year-old man presents with a 12-week history of fever occurring every 48 hours, peaking at 39.5°C, with associated rigors and sweating. Between episodes he feels completely well. He returned from a 6-month work assignment in Nigeria 10 months ago. He took malaria prophylaxis irregularly. Examination during a febrile episode shows temperature 39.4°C, pulse 108 bpm, BP 126/78 mmHg, mild splenomegaly. Three blood films taken during afebrile periods were negative for malaria parasites. What is the most appropriate next step?

A. Repeat thick and thin blood films during a febrile episode (Correct Answer)
B. Perform malaria rapid diagnostic test (RDT) immediately
C. Request serology for Plasmodium vivax and ovale antibodies
D. Arrange bone marrow aspiration for malaria detection
E. Start empirical treatment with artemether-lumefantrine

Explanation: ***Repeat thick and thin blood films during a febrile episode*** - Parasitemia in malaria is maximal during **fever spikes**; repeating the blood films during a febrile episode significantly increases the sensitivity for detecting **Plasmodium parasites**. - The characteristic 48-hour fever cycle, despite previous negative films during afebrile periods, strongly suggests malaria, likely due to **P. vivax** or **P. ovale** which can have lower peripheral parasite densities. *Perform malaria rapid diagnostic test (RDT) immediately* - While useful for rapid screening, **RDTs** are generally less sensitive than microscopy, especially for non-falciparum species like **P. vivax** or **P. ovale**, or in cases of low parasite density. - A negative RDT does not definitively rule out malaria, and **microscopy** remains the gold standard for confirming diagnosis, identifying species, and quantifying parasitemia. *Request serology for Plasmodium vivax and ovale antibodies* - **Serology** detects past exposure to malaria parasites and cannot distinguish between a **past infection** and a current active infection. - It is primarily used for **epidemiological studies** or screening prospective blood donors, not for the acute diagnosis and management of active malaria. *Arrange bone marrow aspiration for malaria detection* - **Bone marrow aspiration** is an invasive procedure and is not part of the standard initial diagnostic workup for malaria. - It is only considered in extremely rare and atypical cases where there is very high clinical suspicion despite multiple negative **peripheral blood films**, and even then, usually after other non-invasive options are exhausted. *Start empirical treatment with artemether-lumefantrine* - **Empirical treatment** with antimalarials is generally discouraged unless the patient is severely ill and rapid diagnosis is unavailable, as it can lead to drug resistance and delays in proper diagnosis. - For relapsing species like **P. vivax** or **P. ovale**, treatment must also include **primaquine** to eradicate liver hypnozoites (radical cure), which requires a confirmed diagnosis and prior **G6PD screening**.

Question 9: A 57-year-old woman presents with a 13-week history of fatigue and 6kg weight loss. She has developed a sensation of fullness after small meals. Her only medication is levothyroxine 100mcg for hypothyroidism. Examination reveals a palpable spleen 4cm below the left costal margin. Blood tests show: Hb 142 g/L, WCC 68 × 10⁹/L (neutrophils 52 × 10⁹/L, lymphocytes 4 × 10⁹/L, eosinophils 3 × 10⁹/L, basophils 5 × 10⁹/L, myelocytes 4 × 10⁹/L), platelets 528 × 10⁹/L. Blood film shows a full spectrum of myeloid cells. What is the most appropriate immediate management?

A. Urgent referral to haematology for suspected chronic myeloid leukaemia within 48 hours (Correct Answer)
B. Arrange bone marrow biopsy in primary care before referral
C. Start prophylactic allopurinol and arrange routine haematology referral
D. Prescribe hydroxycarbamide and refer to haematology within 2 weeks
E. Admit to hospital immediately due to hyperleukocytosis risk

Explanation: ***Urgent referral to haematology for suspected chronic myeloid leukaemia within 48 hours*** - The patient presents with classic **Chronic Myeloid Leukaemia (CML)** features: **splenomegaly**, weight loss, early satiety, and a blood film showing a **full spectrum of myeloid cells** (left shift) with persistent **basophilia**. - Per **NICE guidelines**, an unexplained high white cell count with suspicious clinical features requires an **urgent referral** to a specialist for assessment within **48 hours**. *Arrange bone marrow biopsy in primary care before referral* - **Bone marrow biopsy** is a specialist procedure that must be performed in secondary care to allow for **cytogenetic analysis** (e.g., Philadelphia chromosome). - Primary care lacks the facilities to manage the procedure or provide the necessary **molecular testing** (t(9;22) BCR-ABL1) required for diagnosis. *Start prophylactic allopurinol and arrange routine haematology referral* - **Allopurinol** is used to prevent **tumor lysis syndrome**, but it should be initiated under specialist guidance alongside definitive treatment. - A **routine referral** is inappropriate given the significant **leukocytosis** and constitutional symptoms, as the risk of disease progression must be managed promptly. *Prescribe hydroxycarbamide and refer to haematology within 2 weeks* - Cytoreductive therapy like **hydroxycarbamide** should only be initiated by a haematologist once the diagnosis is confirmed and specific baseline tests are complete. - A **2-week referral** (often for suspected solid tumors) is slower than the **48-hour** standard required for patients with high white cell counts and suspected leukaemia. *Admit to hospital immediately due to hyperleukocytosis risk* - Emergency admission is typically reserved for patients with **hyperviscosity syndrome** or those with a WCC typically exceeding **100 × 10⁹/L**. - This patient is clinically stable with a WCC of **68 × 10⁹/L**, suggesting **chronic phase** CML rather than an acute medical emergency requiring same-day admission.

Question 10: A 53-year-old woman presents with a 14-week history of progressive fatigue, 8kg weight loss, and intermittent abdominal discomfort. She has a history of coeliac disease diagnosed 12 years ago and reports good dietary compliance. Examination shows conjunctival pallor and mild generalised lymphadenopathy with 1cm nodes in cervical and axillary regions. Blood tests show: Hb 94 g/L, MCV 78 fL, WCC 3.2 × 10⁹/L, platelets 142 × 10⁹/L, ferritin 8 μg/L, tissue transglutaminase IgA antibodies negative, IgA level normal. What is the most likely diagnosis?

A. Refractory coeliac disease type II
B. Small bowel adenocarcinoma
C. Non-Hodgkin lymphoma (enteropathy-associated T-cell lymphoma) (Correct Answer)
D. Giardiasis causing malabsorption
E. Progression to ulcerative jejunoileitis

Explanation: ***Non-Hodgkin lymphoma (enteropathy-associated T-cell lymphoma)*** - The combination of **progressive fatigue**, significant **weight loss**, **abdominal discomfort**, and **generalised lymphadenopathy** in a patient with long-standing coeliac disease is highly suggestive of **Enteropathy-associated T-cell lymphoma (EATL)**. - The **pancytopenia** (anemia, leukopenia, thrombocytopenia) and **iron deficiency** despite good dietary compliance further support a systemic malignancy, as EATL can involve bone marrow or cause systemic effects on hematopoiesis. *Refractory coeliac disease type II* - This condition involves persistent villous atrophy despite a strict gluten-free diet and is considered a **pre-malignant state** for EATL. - However, it typically presents with severe malabsorption symptoms and doesn't usually cause **generalised lymphadenopathy** or **pancytopenia** as primary features, which are more indicative of an established lymphoma. *Small bowel adenocarcinoma* - Patients with coeliac disease have an increased risk of this malignancy, but it commonly presents with symptoms of **bowel obstruction**, acute bleeding, or localized abdominal pain. - It is less likely to cause **generalised lymphadenopathy** or the full spectrum of **pancytopenia** observed in this patient, which points to a more systemic disease. *Giardiasis causing malabsorption* - Giardiasis is an intestinal parasitic infection that typically causes **diarrhea**, bloating, and malabsorption. - It does not explain the significant **weight loss**, **generalised lymphadenopathy**, or the profound **pancytopenia** observed in this patient. *Progression to ulcerative jejunoileitis* - This rare complication of coeliac disease involves chronic ulceration of the jejunum and ileum, leading to severe malabsorption, abdominal pain, and potential complications like stricture or perforation. - While it can cause weight loss and malabsorption, it does not typically present with **generalised lymphadenopathy** or the comprehensive **pancytopenia** seen in this clinical picture.

Question 11: Which of the following best describes the 'Pettersson criteria' used in the systematic assessment of prolonged fever in primary care?

A. A structured framework requiring fever >38.3°C for >3 weeks, multiple outpatient assessments, and failure of empirical antibiotic therapy (Correct Answer)
B. A mnemonic-based approach categorizing causes into Infectious, Inflammatory, Iatrogenic, and Neoplastic categories
C. A scoring system that risk-stratifies patients based on age, comorbidities, and fever characteristics to determine need for hospital admission
D. A diagnostic protocol mandating specific investigations in sequence: blood cultures, imaging, then invasive procedures
E. A patient-reported outcome measure assessing fever impact on quality of life and functional capacity

Explanation: ***A structured framework requiring fever >38.3°C for >3 weeks, multiple outpatient assessments, and failure of empirical antibiotic therapy*** - The **Pettersson criteria** are specifically designed to define **Fever of Unknown Origin (FUO)**, which requires a temperature consistently above **38.3°C** and a duration exceeding **3 weeks**. - Crucially, it mandates that the diagnosis remains unclear after at least **three outpatient visits** or three days of intensive hospital investigation, often after failing empirical antibiotic therapy. *A mnemonic-based approach categorizing causes into Infectious, Inflammatory, Iatrogenic, and Neoplastic categories* - While mnemonics such as **

Question 12: A 44-year-old man presents with a 9-week history of fatigue and 7kg unintentional weight loss. He reports daily alcohol consumption of 8-10 units for 20 years but denies recent increase. Examination shows mild jaundice, spider naevi on the chest, palmar erythema, and hepatomegaly 3cm below the costal margin. Blood tests reveal: Hb 108 g/L, MCV 103 fL, platelets 95 × 10⁹/L, bilirubin 48 μmol/L, ALT 124 U/L, AST 268 U/L, ALP 156 U/L, albumin 32 g/L. What is the most important initial investigation to exclude an alternative diagnosis?

A. Hepatitis B and C serology
B. Abdominal ultrasound with Doppler
C. Serum ferritin and transferrin saturation
D. Alpha-fetoprotein (Correct Answer)
E. Liver biopsy with histological assessment

Explanation: ***Alpha-fetoprotein***- In a patient with **chronic liver disease** (suggested by spider naevi and palmar erythema) and **unintentional weight loss**, excluding **hepatocellular carcinoma (HCC)** is the clinical priority.- **Alpha-fetoprotein (AFP)** is a key tumor marker used alongside imaging to screen for and support the diagnosis of HCC in cirrhotic patients.*Hepatitis B and C serology*- While essential to identify the **underlying etiology** of liver disease, it does not explain the acute clinical concern of **rapid weight loss**.- Viral hepatitis can coexist with alcohol-related damage, but it is not the most urgent test to exclude the immediate threat of **malignancy**.*Abdominal ultrasound with Doppler*- This is a critical imaging tool to visualize **liver masses** and assess **portal vein flow**, but it is typically performed in conjunction with blood markers.- Although indicated, biochemical screening for **HCC** via AFP is often prioritized or performed simultaneously to assess the risk of malignancy in a primary care setting.*Serum ferritin and transferrin saturation*- These tests screen for **hereditary haemochromatosis**, which can lead to cirrhosis and increased HCC risk.- While relevant for a complete **liver screen**, they do not address the high suspicion of **HCC** suggested by the patient's weight loss and jaundice.*Liver biopsy with histological assessment*- Biopsy is generally **not the initial investigation** for suspected HCC due to the risk of **tumor seeding** and bleeding complications in cirrhotic patients.- Diagnosis of HCC in a cirrhotic liver is often made using **non-invasive criteria** (triphasic CT/MRI and AFP) rather than histology.

Question 13: A 31-year-old woman presents with a 10-week history of fatigue and 5kg weight loss. She reports episodes of sweating and tremor that resolve after eating. Her mother has type 1 diabetes. Examination reveals a BMI of 19, pulse 92 bpm regular, BP 118/74 mmHg, and a smooth, non-tender thyroid enlargement. Blood tests show: fasting glucose 3.1 mmol/L, HbA1c 34 mmol/mol, TSH 0.1 mU/L, free T4 28 pmol/L. What is the most appropriate next investigation?

A. 72-hour fast with glucose and insulin monitoring
B. Thyroid antibodies (anti-TPO and anti-TSH receptor) (Correct Answer)
C. CT pancreas with contrast
D. Serum insulin, C-peptide and sulphonylurea screen
E. Thyroid ultrasound scan

Explanation: ***Thyroid antibodies (anti-TPO and anti-TSH receptor)*** - The patient presents with clear biochemical **thyrotoxicosis** (low TSH, high free T4) and clinical features like **tachycardia**, weight loss, and a **smooth, non-tender thyroid enlargement**, all highly suggestive of **Graves' disease**. - Testing for **TSH receptor antibodies (TRAb)** is crucial for confirming Graves' disease, while **anti-TPO antibodies** help establish the autoimmune nature of the thyroid disorder. *72-hour fast with glucose and insulin monitoring* - This investigation is the gold standard for diagnosing causes of endogenous hyperinsulinemic hypoglycemia, such as an **insulinoma**. - However, the patient's prominent **thyrotoxicosis** must be investigated first, as it could be contributing to the observed hypoglycemia through increased glucose utilization. *CT pancreas with contrast* - This imaging modality is typically used to localize a pancreatic lesion like an **insulinoma** once biochemical evidence strongly points towards endogenous hyperinsulinism. - It is not the appropriate initial step given the overt signs and biochemical confirmation of a **thyroid disorder** as the primary issue. *Serum insulin, C-peptide and sulphonylurea screen* - These tests are essential for characterizing hypoglycemia by evaluating endogenous insulin production and ruling out exogenous insulin or **sulfonylurea** use. - While the patient has hypoglycemia, the most pressing diagnostic priority is to confirm the cause of **thyrotoxicosis**, which could explain the other symptoms. *Thyroid ultrasound scan* - A thyroid ultrasound provides detailed anatomical information about the thyroid gland, assessing for **nodules**, size, and vascularity. - However, for a diffuse, smooth goiter with overt hyperthyroidism, **antibody testing** is more specific for determining the etiology (e.g., Graves' disease versus other causes of thyrotoxicosis) than structural imaging.

Question 14: According to current evidence-based guidelines for the assessment of undifferentiated symptoms in primary care, which statement best reflects the concept of 'safety netting' in patients presenting with non-specific symptoms such as fatigue or weight loss?

A. Arranging routine follow-up in 4-6 weeks to review symptom progression regardless of initial investigation results
B. Providing clear verbal and written information about symptoms/signs that should prompt re-consultation, with specific timeframe for review or re-contact (Correct Answer)
C. Performing comprehensive screening investigations to exclude serious pathology before discharging the patient
D. Referring all patients with persistent symptoms lasting >6 weeks to secondary care for specialist assessment
E. Documenting that the patient has been advised to return if symptoms worsen or new symptoms develop

Explanation: ***Providing clear verbal and written information about symptoms/signs that should prompt re-consultation, with specific timeframe for review or re-contact***- **Safety netting** is a diagnostic strategy that empowers patients by providing specific **red flags**, expected timeframes for symptom resolution, and clear instructions for re-accessing care.- It manages **diagnostic uncertainty** effectively by ensuring that serious pathology is caught early if symptoms evolve beyond the initial presentation.*Arranging routine follow-up in 4-6 weeks to review symptom progression regardless of initial investigation results*- This approach is a **fixed review** strategy rather than true safety netting, which focuses on identifying **concerning changes** as they occur.- Routine follow-up for every patient is often **inefficient** and may delay care if critical symptoms develop before the scheduled appointment.*Performing comprehensive screening investigations to exclude serious pathology before discharging the patient*- This describes a **rule-out strategy** using investigations, which can lead to **over-diagnosis** and incidental findings in primary care.- Safety netting is intended to supplement, not replace, clinical judgment when **initial low-risk** symptoms do not yet justify invasive testing.*Referring all patients with persistent symptoms lasting >6 weeks to secondary care for specialist assessment*- This is a **referral pathway** protocol rather than a primary care consultation technique used to manage individual patient risk.- Safety netting aims to maintain the **continuity of care** in the community unless specific clinical triggers for specialist intervention are met.*Documenting that the patient has been advised to return if symptoms worsen or new symptoms develop*- Documentation is a **medicolegal requirement**, but vague advice to "return if worse" is considered **ineffective safety netting** due to lack of specificity.- High-quality safety netting requires **specific symptoms** (e.g., "if you develop a new lump") and a defined **time-limited** action plan.

Question 15: A 59-year-old woman with chronic widespread pain managed with amitriptyline 50mg nocte presents for pain review. She describes the pain as 'burning and tingling' in her feet and legs, worse at night, partially relieved by walking around. She has had type 2 diabetes for 12 years. Examination reveals diminished sensation to light touch and pinprick in both feet in stocking distribution, absent ankle reflexes, but normal proprioception and vibration sense. Her HbA1c is 76 mmol/mol (9.1%). What is the most appropriate next step in pain management?

A. Switch to duloxetine 60mg once daily (Correct Answer)
B. Add tramadol 50mg when required for breakthrough pain
C. Increase amitriptyline to 75mg nocte
D. Add gabapentin starting at 300mg nocte with gradual titration
E. Refer to pain clinic for specialist management

Explanation: ***Switch to duloxetine 60mg once daily*** - The patient presents with **diabetic peripheral neuropathy** (burning pain, stocking distribution, absent reflexes); **duloxetine** is a first-line agent specifically licensed and highly effective for this condition. - Switching is preferred over adding medications to limit **polypharmacy** and side effects, and duloxetine may provide better relief for this specific neuropathic profile than continuing TCAs. *Add tramadol 50mg when required for breakthrough pain* - **Tramadol** is generally not recommended for the long-term management of **neuropathic pain** due to the risk of dependence and limited efficacy compared to first-line agents. - NICE guidelines prioritize **modifying maintenance therapy** (like duloxetine or gabapentinoids) rather than using "as required" opioids for chronic nerve pain. *Increase amitriptyline to 75mg nocte* - While **amitriptyline** is a first-line option, the maximum dose for neuropathic pain is usually reached at 75mg, but higher doses carry a significant burden of **anticholinergic side effects**. - Given the suboptimal response and the clear development of diabetic-specific symptoms, switching to a different **first-line class** like an SNRI is often more effective than pushing TCA limits. *Add gabapentin starting at 300mg nocte with gradual titration* - While **gabapentin** is a valid first-line choice for neuropathic pain, adding it to amitriptyline increases the risk of **sedation and dizziness** compared to switching to a single agent. - Monotherapy with **duloxetine** is typically prioritized for diabetic neuropathy before attempting combination therapy with **gabapentinoids**. *Refer to pain clinic for specialist management* - **Specialist referral** is indicated for refractory cases where multiple first- and second-line pharmacological treatments have failed. - This patient has only tried one medication (amitriptyline), so further **primary care management** with agents like duloxetine or pregabalin should be attempted first.

Question 16: A 43-year-old man with well-controlled HIV (CD4 count 520 cells/mm³, undetectable viral load on antiretroviral therapy) presents with a 9-week history of fever up to 38.7°C, night sweats, and 6kg weight loss. He reports no respiratory symptoms. Examination reveals temperature 38.4°C, cervical and axillary lymphadenopathy (multiple nodes 1-2cm, rubbery, non-tender), and mild hepatosplenomegaly. Chest X-ray is normal. Blood tests show: Hb 110 g/L, WCC 4.1×10⁹/L (lymphocytes 0.9×10⁹/L), platelets 165×10⁹/L, LDH 580 U/L (elevated). What is the most important next investigation?

A. CT chest, abdomen and pelvis
B. Excision biopsy of lymph node (Correct Answer)
C. Blood cultures and mycobacterial blood cultures
D. Bone marrow aspiration and trephine
E. Serum cytomegalovirus (CMV) PCR and Epstein-Barr virus (EBV) serology

Explanation: ***Excision biopsy of lymph node*** - This patient presents with classic **B symptoms** (fever, weight loss, night sweats), **generalized lymphadenopathy**, and **elevated LDH**, which are highly suggestive of **HIV-associated lymphoma** even with a high CD4 count. - An **excision biopsy** is the gold standard as it preserves **lymph node architecture**, allowing for precise histological classification, immunohistochemistry, and flow cytometry for definitive diagnosis. *CT chest, abdomen and pelvis* - While **CT imaging** is essential for **staging** a suspected malignancy, it cannot provide the definitive **histopathological diagnosis** required to begin treatment. - Imaging may identify further deep lymphadenopathy but will not distinguish between **lymphoma**, **tuberculosis**, or **sarcoidosis** without tissue sampling. *Blood cultures and mycobacterial blood cultures* - These are useful in evaluating **Fever of Unknown Origin (FUO)**, but the presence of persistent, rubbery lymphadenopathy and high LDH strongly shifts the priority toward **malignancy**. - **Mycobacterial infections** usually present with more significant immunosuppression (CD4 <200) or specific pulmonary findings, which are not present here. *Bone marrow aspiration and trephine* - **Bone marrow examination** is typically part of the **staging process** for lymphoma rather than the initial diagnostic step for accessible peripheral lymphadenopathy. - It is less likely to yield a definitive subtype diagnosis compared to direct **tissue biopsy** of an enlarged node. *Serum cytomegalovirus (CMV) PCR and Epstein-Barr virus (EBV) serology* - While **EBV** is associated with HIV-related lymphomas, serology or PCR is not diagnostic of the tumor itself and cannot replace **tissue histology**. - **CMV** usually presents with specific organ involvement (e.g., retinitis, colitis) and is rare in a patient with a stable **CD4 count of 520 cells/mm³**.

Question 17: Which of the following patient presentations would meet the NICE definition for requiring a 2-week wait referral under the suspected cancer pathway for unexplained weight loss in adults?

A. A 62-year-old man with 4kg weight loss over 6 months and lethargy with normal examination
B. A 58-year-old woman with 6kg weight loss over 8 weeks and upper abdominal pain with normal blood tests
C. A 71-year-old man with 5kg weight loss over 12 weeks and change in bowel habit with iron deficiency anaemia (Correct Answer)
D. A 48-year-old woman with 8kg weight loss over 4 months and loss of appetite with normal examination and investigations
E. A 55-year-old man with 4% body weight loss over 10 weeks with night sweats and normal chest X-ray

Explanation: ***A 71-year-old man with 5kg weight loss over 12 weeks and change in bowel habit with iron deficiency anaemia*** - Under **NICE NG12 guidelines**, patients aged **60 and over** with unexplained **iron deficiency anaemia** or **changes in bowel habit** meet criteria for a 2-week wait (2WW) referral for suspected **colorectal cancer**. - The presence of significant **unexplained weight loss** in combination with these site-specific red flags reinforces the urgent need for a suspected cancer pathway referral. *A 62-year-old man with 4kg weight loss over 6 months and lethargy with normal examination* - **Lethargy** and weight loss are non-specific symptoms; without localized findings or abnormal investigations, they do not automatically trigger a **2WW referral** under NG12. - The appropriate clinical step is to perform **primary care investigations** (e.g., FBC, ESR/CRP, U&Es) before referring to a specific pathway. *A 58-year-old woman with 6kg weight loss over 8 weeks and upper abdominal pain with normal blood tests* - While **upper abdominal pain** and weight loss in those over 55 can warrant **urgent direct access endoscopy**, the description of "normal blood tests" would generally precede or be part of the initial workup for a lower-risk profile. - For a 2WW for **pancreatic cancer**, NICE specifically looks for weight loss plus specific features like **jaundice** or age over 60 with new-onset diabetes. *A 48-year-old woman with 8kg weight loss over 4 months and loss of appetite with normal examination and investigations* - Significant **unexplained weight loss** alone in a patient under 60 without site-specific symptoms or abnormal **blood tests** does not meet the 2WW threshold. - This patient requires careful monitoring and potentially a **non-site-specific** (vague symptoms) pathway referral if available, but not a standard 2WW organ-specific pathway. *A 55-year-old man with 4% body weight loss over 10 weeks with night sweats and normal chest X-ray* - **Night sweats** and weight loss may suggest **lymphoma**, but NICE criteria prioritize physical signs like **lymphadenopathy** or splenomegaly for urgent referral. - A **4% weight loss** is just below the typical clinical threshold of **5%** used to define significant weight loss, and a normal CXR reduces the urgency for a lung cancer pathway.

Question 18: A 74-year-old man presents with a 14-week history of progressive fatigue, loss of appetite, and 11kg unintentional weight loss. He has noticed increasing abdominal distension and ankle swelling. He has a 40 pack-year smoking history. Examination reveals cachexia, mild jaundice, ascites (positive fluid thrill), hepatomegaly (liver edge 6cm below costal margin, irregular and hard), and bilateral pitting ankle oedema. What is the most appropriate initial investigation?

A. Upper gastrointestinal endoscopy
B. Ultrasound abdomen with Doppler (Correct Answer)
C. Liver function tests, alpha-fetoprotein, and hepatitis B/C serology
D. CT chest, abdomen and pelvis with contrast
E. Ascitic tap for cell count, culture, and cytology

Explanation: ***Ultrasound abdomen with Doppler***- **Ultrasound** is the recommended **initial investigation** for suspected hepatic malignancy as it is non-invasive, quick, and highly effective at identifying **liver lesions** and confirming **ascites**.- The addition of **Doppler** allows for the assessment of **vascular patency**, which is crucial to rule out complications like **portal vein thrombosis** in a patient with new-onset ascites.*Upper gastrointestinal endoscopy*- This is primarily used to investigate suspected **upper GI cancers** or to screen for **oesophageal varices** in known cirrhotics but is not the first-line tool for an irregular, hard **hepatomegaly**.- While the patient has weight loss, the physical examination findings of an enlarged, irregular liver point specifically toward **primary or metastatic liver disease**.*Liver function tests, alpha-fetoprotein, and hepatitis B/C serology*- Although these blood tests provide essential diagnostic information regarding **liver dysfunction** and potential **Hepatocellular Carcinoma (HCC)**, they do not provide the anatomical detail needed for initial evaluation.- **Imaging** must take precedence over tumor markers like **AFP** to characterize the structural abnormalities detected on palpation.*CT chest, abdomen and pelvis with contrast*- **CT scanning** is a vital tool for **staging** and detailed characterization of malignancy, but it is typically performed after an initial screening ultrasound identifies a mass.- Ultrasound is more readily available and safer as a first step to confirm the presence of **ascites** and guide the focus of further cross-sectional imaging.*Ascitic tap for cell count, culture, and cytology*- An **ascitic tap** is necessary to calculate the **SAAG** and look for **malignant cells**, but it should be performed following or alongside imaging to ensure the procedure is safe.- Imaging like ultrasound is required first to determine if the fluid is **loculated** and to define the underlying cause of the ascites, such as a **liver mass**.

Question 19: A 38-year-old woman presents with a 6-month history of severe fatigue, unrefreshing sleep, and post-exertional malaise lasting >24 hours after minimal activity. She reports cognitive difficulties ('brain fog'), orthostatic intolerance with dizziness on standing, and flu-like symptoms. She was previously very active but now struggles with daily activities. Symptoms began after a viral illness. Examination and extensive investigations including FBC, TFTs, glucose, vitamin B12, folate, ferritin, CRP, and cortisol are all normal. What is the most appropriate diagnosis?

A. Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) (Correct Answer)
B. Fibromyalgia
C. Depression with somatic symptoms
D. Post-viral fatigue syndrome
E. Functional neurological disorder

Explanation: ***Chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME)*** - The diagnosis is confirmed by the presence of debilitating **fatigue**, **unrefreshing sleep**, **cognitive dysfunction**, and the hallmark sign of **post-exertional malaise (PEM)** lasting over 24 hours. - These symptoms, persisting for at least **6 months** and with **normal extensive investigations**, meet the criteria for CFS/ME, often triggered by a preceding **viral illness**. *Fibromyalgia* - While it shares symptoms like fatigue and sleep issues, the primary feature of fibromyalgia is **widespread chronic pain** and tenderness at specific points. - This patient's presentation is dominated by **post-exertional malaise** and fatigue rather than the characteristic diffuse musculoskeletal pain required for fibromyalgia. *Depression with somatic symptoms* - Depression frequently causes fatigue and sleep disturbance, but it typically lacks the characteristic **post-exertional malaise** and **orthostatic intolerance** seen in CFS/ME. - Patients with depression often experience an **improvement in energy** with activity, whereas patients with CFS/ME experience a clinical worsening (PEM). *Post-viral fatigue syndrome* - This term describes fatigue following an infection that lasts **less than 3 to 6 months**; once symptoms persist beyond this duration with specific criteria, it is classified as **CFS/ME**. - Since this patient has been symptomatic for **6 months**, the more definitive diagnosis of CFS/ME is appropriate. *Functional neurological disorder* - FND typically involves specific **motor or sensory symptoms** (e.g., limb weakness, non-epileptic seizures) that are often inconsistent on examination. - While fatigue can co-occur, FND does not explain the full cluster of **orthostatic intolerance**, **PEM**, and **flu-like symptoms** provided in this history.

Question 20: A 69-year-old man with no significant past medical history presents with a 12-week history of fever (documented temperatures 38.2-38.9°C), 8kg weight loss, and progressive fatigue. He has diffuse myalgia but no specific pain. Examination reveals temperature 38.6°C, no lymphadenopathy, heart sounds normal, chest clear, and no organomegaly. Blood tests show: Hb 102 g/L (normochromic, normocytic), WCC 11.2×10⁹/L, platelets 445×10⁹/L, ESR 95 mm/hr, CRP 88 mg/L, ALP 156 U/L (other LFTs normal). Blood cultures (3 sets) are negative. Chest X-ray and urine culture are normal. What is the single most important investigation to perform next?

A. Temporal artery ultrasound or biopsy (Correct Answer)
B. CT chest, abdomen and pelvis with contrast
C. Echocardiography (transthoracic)
D. Bone marrow aspiration and trephine
E. Autoimmune screen including ANA, ANCA, and rheumatoid factor

Explanation: ***Temporal artery ultrasound or biopsy***- This patient presents with **fever of unknown origin (FUO)**, **weight loss**, and **anemia of chronic disease**, which in an elderly patient with high **ESR/CRP**, **diffuse myalgias**, and elevated **ALP**, strongly suggests **Giant Cell Arteritis (GCA)**.- Prompt diagnosis via **temporal artery ultrasound** (looking for the **halo sign**) or **biopsy** is crucial for GCA due to the risk of **irreversible vision loss**, making it the most urgent next investigation.*CT chest, abdomen and pelvis with contrast*- While a comprehensive **CT scan** is often part of a **FUO workup** to identify occult malignancy or deep-seated infection, the specific clinical picture points more strongly towards **vasculitis**.- Although GCA can cause **aortitis** which may be seen on CT, it is not the initial diagnostic test for GCA itself, which requires direct assessment of the temporal arteries.*Echocardiography (transthoracic)*- This investigation is primarily used to diagnose **infective endocarditis**, a less likely cause of FUO in this patient given **negative blood cultures** and the absence of a new **heart murmur**.- While culture-negative endocarditis exists, the overall presentation of diffuse myalgia and isolated elevated ALP is more consistent with a rheumatological condition like GCA.*Bone marrow aspiration and trephine*- **Bone marrow biopsy** is an invasive procedure typically reserved for cases where **hematological malignancy** or **granulomatous infection** (e.g., disseminated TB) is suspected and other less invasive tests have been inconclusive.- The **normocytic anemia** and **thrombocytosis** are non-specific findings often seen in conditions causing systemic inflammation and do not, in themselves, prioritize bone marrow examination as the most important next step.*Autoimmune screen including ANA, ANCA, and rheumatoid factor*- An **autoimmune screen** assesses for conditions like **SLE** or **ANCA-associated vasculitis**, which usually present with more specific organ system involvement (e.g., rash, arthritis, renal disease).- While useful in a broad FUO workup, these conditions are less likely to be the primary diagnosis in this elderly patient with classic GCA symptoms and high inflammatory markers, making the specific investigation for GCA more urgent.

Question 21: A 51-year-old woman presents with a 9-month history of widespread pain affecting her neck, back, shoulders, and hips bilaterally. She reports severe fatigue, non-restorative sleep despite 9 hours in bed, and difficulty concentrating. Pain scores 7/10 daily. She has tried paracetamol and ibuprofen with minimal benefit. Examination reveals multiple tender points but no synovitis or muscle weakness. Blood tests including FBC, CRP, ESR, TFTs, calcium, and vitamin D are normal. What is the most appropriate next management step?

A. Commence duloxetine and arrange cognitive behavioural therapy referral (Correct Answer)
B. Refer to rheumatology for specialist assessment
C. Start prednisolone 15mg daily for suspected polymyalgia rheumatica
D. Arrange MRI spine to exclude structural pathology
E. Prescribe amitriptyline for pain and sleep, with review in 2 weeks

Explanation: ***Commence duloxetine and arrange cognitive behavioural therapy referral***- This patient presents with classic **fibromyalgia** features, including chronic widespread pain, fatigue, **non-restorative sleep**, and cognitive dysfunction with normal inflammatory markers.- NICE guidelines for **chronic primary pain** recommend a multimodal approach using **SNRIs** (like duloxetine) and psychological therapies such as **Cognitive Behavioural Therapy (CBT)**.*Refer to rheumatology for specialist assessment*- **Fibromyalgia** is a clinical diagnosis that should ideally be managed in **primary care** once secondary causes are excluded by normal blood tests.- Specialist referral is typically reserved for diagnostic uncertainty or cases **refractory** to standard primary care interventions.*Start prednisolone 15mg daily for suspected polymyalgia rheumatica*- Although the age and proximal muscle involvement (shoulders/hips) may suggest **Polymyalgia Rheumatica (PMR)**, the 9-month history and **normal CRP/ESR** make this diagnosis unlikely.- PMR is an **inflammatory** condition characterized by elevated inflammatory markers and a rapid response to steroids, whereas fibromyalgia does not respond to corticosteroids.*Arrange MRI spine to exclude structural pathology*- Imaging is not indicated in this case as there are no **red flags** (e.g., focal neurological deficits, progressive motor weakness, cauda equina symptoms) or history of trauma to suggest structural spinal pathology.- Extensive imaging in suspected fibromyalgia can lead to the incidental finding of **degenerative changes** which may be irrelevant to the patient's centralized pain syndrome and cause unnecessary anxiety.*Prescribe amitriptyline for pain and sleep, with review in 2 weeks*- While low-dose **tricyclic antidepressants** like amitriptyline were historically used for fibromyalgia, current guidelines often prioritize **SNRIs** (duloxetine) or Gabapentinoids due to better tolerability profiles or specific mechanisms for neuropathic-like pain.- Two weeks is often insufficient to evaluate the full therapeutic benefit of antidepressants in chronic pain management, and a multimodal approach including **CBT** is generally preferred from the outset.

Question 22: A 66-year-old woman presents with a 16-week history of fatigue, poor appetite, and 7kg weight loss. She reports feeling generally unwell with muscle aches and low mood. Blood tests show: Hb 118 g/L, WCC 6.8×10⁹/L, platelets 245×10⁹/L, Na+ 128 mmol/L, K+ 5.2 mmol/L, urea 7.8 mmol/L, creatinine 88 μmol/L, glucose 3.8 mmol/L. What is the most appropriate next step?

A. Measure 9 am serum cortisol (Correct Answer)
B. Check thyroid function tests
C. Measure serum ACTH
D. Arrange urgent endocrinology referral for suspected adrenal insufficiency
E. Perform short synacthen test

Explanation: ***Measure 9 am serum cortisol***- The patient presents with clinical signs of **adrenal insufficiency** (fatigue, weight loss, muscle aches, low mood) and classic biochemistry including **hyponatraemia**, **hyperkalaemia**, and **hypoglycaemia**.- A **9 am serum cortisol** is the recommended initial screening test in primary care; levels **<100 nmol/L** strongly suggest insufficiency, while **>500 nmol/L** generally exclude it.*Check thyroid function tests*- While **hypothyroidism** can cause fatigue and weight loss (though weight gain is more common), it does not typically cause **hyperkalaemia** or significant **hyponatraemia**.- Thyroid dysfunction should be part of a broader workup, but the electrolyte pattern makes **adrenal insufficiency** the clinical priority.*Measure serum ACTH*- **Serum ACTH** is used to differentiate between **primary** (Addison's) and **secondary** adrenal insufficiency once cortisol deficiency is confirmed.- It is not the initial step in the diagnostic pathway and is often interpreted alongside the results of a stimulation test.*Arrange urgent endocrinology referral for suspected adrenal insufficiency*- Referrals are typically indicated after an initial screening cortisol level is obtained, unless the patient is in an **addisonian crisis** (hemodynamically unstable).- This patient is currently stable, so the biochemical diagnosis should be initiated in the primary care setting first.*Perform short synacthen test*- The **short synacthen test** is the definitive gold standard for diagnosis but is usually performed in a **specialist setting** or after an abnormal 9 am cortisol.- In primary care, the **9 am cortisol** serves as the mandated first-line screen before proceeding to stimulation testing.

Question 23: A 45-year-old man presents with an 8-week history of recurrent fever, typically occurring every 3 days, associated with severe rigors, headache, and myalgia. He immigrated from Nigeria 15 years ago and recently visited his family in Lagos for 2 months, returning 10 weeks ago. He did not take malaria prophylaxis. Examination during a febrile episode shows temperature 39.8°C, mild splenomegaly, and jaundice. What is the most appropriate immediate investigation?

A. Thick and thin blood films for malaria parasites (Correct Answer)
B. Rapid malaria antigen detection test
C. Full blood count and liver function tests
D. Serology for dengue fever
E. Blood cultures

Explanation: ***Thick and thin blood films for malaria parasites*** - These are the **gold standard** for diagnosis; thick films offer high sensitivity to detect low parasite levels, while thin films allow for **species identification** and **quantification of parasitaemia**. - Given the patient's travel to **Lagos**, cyclical fever symptoms (every 3 days suggests *Plasmodium vivax* or *ovale* or more commonly *P. malariae* for tertian, or *P. falciparum* for irregular), mild splenomegaly, jaundice, and lack of **prophylaxis**, this immediate test is essential to confirm malaria and assess clinical severity. *Rapid malaria antigen detection test* - While useful in settings with limited microscopy expertise, **RDTs** are generally less sensitive than microscopy and may provide **false negatives** in low parasitaemia cases or with certain species. - They cannot determine the exact **percentage of infected red cells**, which is a critical metric for managing potential **Plasmodium falciparum** infections and assessing disease severity. *Full blood count and liver function tests* - These tests provide supportive evidence, such as **thrombocytopenia** (low platelets) and **hyperbilirubinemia** due to hemolysis, but they are not diagnostic of malaria itself. - They should be performed alongside malaria-specific tests to monitor for complications like **anemia** or organ dysfunction, but they do not identify the causative pathogen directly. *Serology for dengue fever* - Dengue typically presents with high fever, **retro-orbital pain**, and a distinct rash, often with a shorter incubation period than the 10 weeks seen here, and is less likely to cause recurrent, cyclical fever. - **Serology** is a retrospective diagnostic tool, primarily detecting antibodies, and does not provide the immediate diagnosis of acute infection required for a patient with severe symptoms and high malaria suspicion. *Blood cultures* - Blood cultures are necessary to rule out **enteric fever** (typhoid) or **bacterial sepsis**, which can present with fever in a returned traveler. - Although important for investigating a fever in a returned traveler, the specific cyclical nature of the fever, travel history, and other findings (splenomegaly, jaundice) make **malaria** the most urgent and likely diagnosis, requiring a different immediate investigation.

Question 24: According to NICE guidance on the assessment of chronic pain in primary care, which statement best describes the recommended initial approach to evaluating a patient presenting with persistent widespread pain and fatigue lasting 6 months?

A. Comprehensive investigations including inflammatory markers, autoimmune screen, vitamin D, and thyroid function should be performed before making a diagnosis
B. A biopsychosocial assessment exploring physical symptoms, psychological factors, and social context should be the primary framework for evaluation (Correct Answer)
C. Pain should be quantified using a numerical rating scale, and analgesia optimised before further assessment
D. Referral to rheumatology for specialist evaluation should be arranged if examination is normal
E. MRI imaging of affected areas should be performed to exclude structural pathology

Explanation: ***A biopsychosocial assessment exploring physical symptoms, psychological factors, and social context should be the primary framework for evaluation*** - NICE guidance for chronic primary pain emphasizes a **biopsychosocial model** as the initial approach, considering the interplay of **biological**, **psychological**, and **social factors**.- This assessment prioritizes understanding the functional impact of pain on the patient's life, rather than solely focusing on a biomedical search for pathology. *Comprehensive investigations including inflammatory markers, autoimmune screen, vitamin D, and thyroid function should be performed before making a diagnosis* - NICE recommends a **targeted approach to investigations**, only performing tests indicated by the clinical history and examination, not a comprehensive screening battery.- Routine, exhaustive screening without specific red flags can lead to **unnecessary anxiety**, over-medicalization, and does not align with the initial **biopsychosocial assessment** for chronic pain. *Pain should be quantified using a numerical rating scale, and analgesia optimised before further assessment* - While pain quantification is useful, NICE guidance for chronic pain prioritizes a **holistic assessment** over immediate optimization of analgesia alone.- Focusing solely on medication without addressing the broader biopsychosocial context may not be effective for **chronic primary pain** and can lead to over-reliance on drugs. *Referral to rheumatology for specialist evaluation should be arranged if examination is normal* - A normal physical examination in the context of persistent widespread pain and fatigue, without **red flags**, typically points away from a primary rheumatological condition requiring immediate specialist referral.- NICE emphasizes **primary care-led management** using the biopsychosocial model, reserving specialist referrals for diagnostic uncertainty or complex management needs after initial assessment. *MRI imaging of affected areas should be performed to exclude structural pathology* - Routine **advanced imaging** like MRI is not recommended for chronic widespread pain without specific neurological signs or **red flags** as it rarely alters management.- Imaging often reveals incidental findings that can cause **unnecessary patient anxiety** and may not correlate with the patient's pain experience in chronic primary pain.

Question 25: A 28-year-old woman presents with a 7-week history of fatigue, night sweats, and intermittent fever. She returned from a 6-month backpacking trip through Southeast Asia 3 months ago. Examination reveals temperature 38.3°C, cervical lymphadenopathy (2cm mobile nodes), and mild splenomegaly. Blood tests show: Hb 108 g/L, WCC 3.2×10⁹/L, platelets 142×10⁹/L, ESR 68 mm/hr. What is the most appropriate next investigation?

A. Chest X-ray (Correct Answer)
B. Malaria blood film
C. HIV serology with hepatitis B and C screening
D. Abdominal ultrasound
E. Monospot test

Explanation: ***Chest X-ray*** - A **Chest X-ray** is the essential initial investigation for suspected **Tuberculosis (TB)**, which is strongly suggested by the patient's travel to Southeast Asia, night sweats, and persistent fever. - Even in the absence of respiratory symptoms, it can reveal **hilar lymphadenopathy**, upper lobe infiltrates, or a **miliary pattern** consistent with systemic dissemination. *Malaria blood film* - While travel history is present, the **7-week duration** of symptoms and the 3-month gap since return make acute malaria less likely than more chronic infections. - Malaria typically presents with a more acute, paroxysmal fever rather than the **pancytopenia** and significantly **elevated ESR** seen here. *HIV serology with hepatitis B and C screening* - Although constitutional symptoms can occur in **HIV**, the priority is to rule out transmissible and treatable chronic infections like TB first in a febrile traveler. - These tests are important components of a **fever of unknown origin** workup but are generally performed alongside or after initial imaging. *Abdominal ultrasound* - While it could evaluate the **splenomegaly**, it is less likely to provide a definitive primary diagnosis compared to a chest X-ray in this clinical context. - It would be more appropriate if the patient had localized abdominal pain or significant **deranged liver function tests**. *Monospot test* - The **Monospot test** for Infectious Mononucleosis is generally less useful here given the **7-week duration** of symptoms; most acute EBV infections resolve sooner. - The travel history and the presence of **pancytopenia** point toward a more chronic, systemic infectious or granulomatous process.

Question 26: A 57-year-old man presents with a 4-month history of progressive fatigue and 9kg unintentional weight loss. He reports increased thirst and nocturia (4-5 times per night). His brother has type 2 diabetes. Examination reveals BMI 26 kg/m², mild muscle wasting, and dry mucous membranes. Random glucose is 18.2 mmol/L. Which additional investigation is most important to perform urgently?

A. Serum beta-hydroxybutyrate or urine ketones (Correct Answer)
B. HbA1c
C. C-peptide level
D. Fasting glucose
E. Glutamic acid decarboxylase (GAD) antibodies

Explanation: ***Serum beta-hydroxybutyrate or urine ketones***- This patient exhibits signs of **insulin deficiency** (weight loss, muscle wasting) and severe hyperglycemia; urgent screening for **ketosis** is the priority to rule out **Diabetic Ketoacidosis (DKA)**.- Detection of **ketones** is critical for immediate triage, as their presence indicates a medical emergency requiring urgent fluid resuscitation and insulin therapy.*HbA1c*- While useful for measuring **glycemic control** over the past 3 months and confirming a diagnosis of diabetes, it does not provide information on **acute metabolic stability**.- This test is not urgent and cannot identify life-threatening complications like **DKA** in the acute setting.*C-peptide level*- This is used to assess **endogenous insulin production** to differentiate between Type 1 and Type 2 diabetes but is not an emergency investigation.- Results are often unreliable during acute **glucose toxicity**, making it inappropriate for the initial urgent assessment.*Fasting glucose*- The random glucose of 18.2 mmol/L is already diagnostic of **diabetes mellitus** in a symptomatic patient, making a fasting sample redundant.- Delaying assessment to obtain a fasting state would be dangerous given the risk of **metabolic decompensation**.*Glutamic acid decarboxylase (GAD) antibodies*- These antibodies help identify **Latent Autoimmune Diabetes in Adults (LADA)** or Type 1 Diabetes but do not influence acute management.- **Serology** results take days to return and are secondary to the immediate need for excluding **ketoacidosis**.

Question 27: A 32-year-old woman presents with a 5-month history of profound fatigue and cold intolerance. She reports gaining 8kg despite reduced appetite, constipation, and dry skin. Her periods have become heavier and irregular. On examination, her pulse is 54 bpm, BP 130/85 mmHg, and she has delayed relaxation of ankle reflexes. What is the most appropriate first-line investigation?

A. Serum thyroid-stimulating hormone (TSH) (Correct Answer)
B. Full blood count and ferritin
C. Serum cortisol and ACTH
D. Serum free T4 only
E. Anti-thyroid peroxidase antibodies

Explanation: ***Serum thyroid-stimulating hormone (TSH)*** - This patient's symptoms, including profound **fatigue**, **cold intolerance**, **weight gain**, **constipation**, **dry skin**, **menorrhagia**, **bradycardia** (pulse 54 bpm), and crucially, **delayed relaxation of ankle reflexes**, are classic for **hypothyroidism**. - **Serum TSH** is the most sensitive first-line screening test for primary hypothyroidism because it becomes elevated early as the pituitary gland compensates for falling thyroid hormone levels, often before free T4 levels drop significantly. *Full blood count and ferritin* - While **fatigue** and **menorrhagia** could suggest **iron deficiency anemia**, these tests do not explain the comprehensive constellation of symptoms like **cold intolerance**, **bradycardia**, or **delayed ankle reflexes**. - Anemia might be a secondary finding, but it is not the primary diagnostic test for the metabolic disorder indicated by the patient's presentation. *Serum cortisol and ACTH* - These investigations are performed to assess **adrenal function** (e.g., Addison's disease or Cushing's syndrome), which can present with fatigue or weight changes. - However, the specific combination of **cold intolerance**, **constipation**, **bradycardia**, and especially **delayed ankle reflexes** points strongly away from an adrenal pathology and towards thyroid dysfunction. *Serum free T4 only* - Measuring only **serum free T4** as a first-line test is less sensitive for detecting early or subclinical hypothyroidism compared to TSH. - In early stages of primary hypothyroidism, TSH can be elevated while free T4 may still be within the normal or low-normal range, potentially leading to a missed diagnosis if TSH is not also checked. *Anti-thyroid peroxidase antibodies* - These antibodies are used to identify an **autoimmune etiology**, such as **Hashimoto's thyroiditis**, as the cause of established thyroid dysfunction. - They are not a primary screening tool to initially diagnose the presence of hypothyroidism; rather, they provide information about the underlying cause once thyroid dysfunction has been confirmed biochemically.

Question 28: A 63-year-old man with metastatic prostate cancer presents for pain review. He reports constant deep aching pain in his lumbar spine and pelvis (7/10 severity) partially controlled with morphine sulfate modified-release 60mg BD. He experiences 4-5 episodes daily of sudden-onset severe shooting pain (9/10) in his right leg lasting 1-2 minutes, triggered by movement. Background pain is adequately controlled but breakthrough pain significantly impacts function. Current medications: morphine sulfate MR 60mg BD, paracetamol 1g QDS, and ibuprofen 400mg TDS. What is the most appropriate modification to his pain management?

A. Increase morphine sulfate MR to 90mg BD and add morphine immediate-release 20mg for breakthrough pain
B. Add gabapentin 300mg at night, titrating up gradually, and provide morphine immediate-release 10-20mg for breakthrough pain (Correct Answer)
C. Switch to transdermal fentanyl patch and discontinue oral morphine
D. Add amitriptyline 10mg at night and continue current opioid dose
E. Refer for urgent radiotherapy to painful bony metastases

Explanation: ***Add gabapentin 300mg at night, titrating up gradually, and provide morphine immediate-release 10-20mg for breakthrough pain***- The patient presents with **neuropathic breakthrough pain** (shooting, short-lived episodes, triggered by movement), which requires an adjuvant like **gabapentin** as opioids alone are often insufficient for this pain type.- He also requires a PRN (pro re nata) **immediate-release opioid** for breakthrough episodes, ideally calculated as **1/6th to 1/10th** of the total daily morphine dose (120mg/day, so 12-20mg). *Increase morphine sulfate MR to 90mg BD and add morphine immediate-release 20mg for breakthrough pain* - Increasing the **modified-release (MR)** background dose is inappropriate because his constant background pain is already **adequately controlled**. - This modification primarily focuses on **nociceptive** pathways and fails to specifically target the **neuropathic component** described by the shooting pain. *Switch to transdermal fentanyl patch and discontinue oral morphine* - A **fentanyl patch** is indicated when pain is stable or if the patient cannot tolerate oral medication, but it is not the first-line choice for managing **uncontrolled breakthrough pain**. - Switching opioids (opioid rotation) is not indicated here as the patient's **background pain** is already well-managed on his current morphine dose. *Add amitriptyline 10mg at night and continue current opioid dose* - While **amitriptyline** is a valid adjuvant for neuropathic pain, this option fails to address the critical need for **immediate-release morphine** for breakthrough episodes. - Morphine MR alone does not provide the flexibility needed to manage sudden-onset, severe **movement-triggered pain** sessions. *Refer for urgent radiotherapy to painful bony metastases* - While **palliative radiotherapy** is effective for localized bone pain, it does not provide the **immediate pharmacological relief** required for breakthrough neuropathic symptoms. - The priority in this clinical review is to optimize the medical management of both **neuropathic and breakthrough pain** components.

Question 29: A 49-year-old woman presents with a 22-week history of severe, unrelenting fatigue that is not relieved by rest. She describes post-exertional malaise lasting >24 hours after minimal activity, unrefreshing sleep, difficulty concentrating ('brain fog'), and orthostatic intolerance. Previously very active, she now struggles with basic daily tasks. Examination and extensive blood tests (FBC, U&Es, LFTs, TFTs, glucose, CRP, ferritin, B12, folate, coeliac serology) are all normal. What is the most appropriate diagnosis?

A. Chronic fatigue syndrome/Myalgic encephalomyelitis (CFS/ME) (Correct Answer)
B. Depression with somatic symptoms
C. Fibromyalgia
D. Hypothyroidism with normal thyroid function tests
E. Adrenal insufficiency

Explanation: ***Chronic fatigue syndrome/Myalgic encephalomyelitis (CFS/ME)*** - The patient meets the **NICE criteria** for CFS/ME, requiring severe fatigue for at least 3 months, **post-exertional malaise (PEM)** lasting >24 hours, unrefreshing sleep, cognitive impairment, and **orthostatic intolerance**. - A diagnosis of CFS/ME is made clinically after a thorough workup has **excluded other potential causes** for the symptoms, which is consistent with the extensive normal blood tests. *Depression with somatic symptoms* - While fatigue, unrefreshing sleep, and **'brain fog'** can be symptoms of depression, the defining feature of severe **post-exertional malaise (PEM)** is not a primary diagnostic criterion for mood disorders. - Depression typically features prominent **anhedonia** or persistent low mood, which are not the central complaints presented, despite the functional impact. *Fibromyalgia* - **Fibromyalgia** is primarily characterized by widespread **musculoskeletal pain** and tenderness at specific points, which is not described as the patient's main symptom. - Although fatigue is common, the specific cluster of symptoms including severe **PEM** and orthostatic intolerance are more indicative of CFS/ME than fibromyalgia. *Hypothyroidism with normal thyroid function tests* - The patient's **normal thyroid function tests (TFTs)**, specifically normal TSH and T4 levels, effectively rule out hypothyroidism as the cause of her fatigue. - A diagnosis of hypothyroidism requires **abnormal biochemical markers**, which are absent in this case. *Adrenal insufficiency* - Primary **adrenal insufficiency (Addison's disease)** typically presents with fatigue, but would also commonly show **electrolyte abnormalities** like hyponatremia and hyperkalemia, or hypoglycemia. - The patient's **normal U&Es and glucose** levels, along with the absence of typical hyperpigmentation, make adrenal insufficiency an unlikely diagnosis.

Question 30: A 56-year-old man presents with a 17-week history of fatigue and 8kg weight loss. He reports vague abdominal discomfort and change in bowel habit with looser stools. He is a smoker (25 pack-years). Examination reveals BMI 23 kg/m², pulse 92 bpm, BP 134/82 mmHg, and vague epigastric tenderness. Blood tests show: Hb 118 g/L, MCV 88 fL, platelets 542 × 10⁹/L, albumin 34 g/L, bilirubin 42 µmol/L, ALT 68 U/L, ALP 324 U/L, GGT 186 U/L, CA19-9 680 U/mL (normal <37). What is the most likely diagnosis?

A. Chronic pancreatitis
B. Hepatocellular carcinoma
C. Pancreatic adenocarcinoma (Correct Answer)
D. Cholangiocarcinoma
E. Alcoholic liver disease with cirrhosis

Explanation: ***Pancreatic adenocarcinoma***- The patient's presentation with **significant weight loss**, **vague abdominal pain**, **change in bowel habit** (suggesting **steatorrhea**), and a **markedly elevated CA19-9** (680 U/mL) is highly suggestive of pancreatic adenocarcinoma.- The laboratory findings, including a **cholestatic liver pattern** (elevated ALP, GGT, and bilirubin) and **thrombocytosis**, are classic features often due to biliary obstruction and paraneoplastic effects, respectively.*Chronic pancreatitis*- While it can cause weight loss and abdominal pain, chronic pancreatitis pain is typically severe and episodic, often associated with a history of recurrent acute pancreatitis or **heavy alcohol use**.- It is less likely to present with such an acute elevation of **CA19-9** and **obstructive jaundice** without a clear acute flare, and imaging often shows **pancreatic calcifications**.*Hepatocellular carcinoma*- This malignancy is typically associated with **Alpha-fetoprotein (AFP)** elevation rather than CA19-9 as its primary tumor marker.- It usually arises in the setting of **chronic liver disease** or cirrhosis, which is not clearly established by the patient's history or liver enzyme pattern, which points to obstruction rather than hepatocellular injury.*Cholangiocarcinoma*- Although it presents with **obstructive jaundice** and elevated CA19-9, cholangiocarcinoma is less common than pancreatic cancer.- The **vague epigastric tenderness** and prominent **change in bowel habit** (steatorrhea) are often more characteristic of pancreatic head tumors, which can obstruct both bile and pancreatic ducts.*Alcoholic liver disease with cirrhosis*- This typically presents with an **AST:ALT ratio > 2:1** and signs of portal hypertension, which are not the primary features in this patient's laboratory results.- While it can cause low albumin and weight loss, it does not explain the **highly elevated CA19-9** or the significant **thrombocytosis**.

Question 31: A 37-year-old woman presents with a 13-week history of fatigue, intermittent low-grade fever up to 37.9°C, and arthralgia affecting her hands and knees. She has noticed a rash on her shins. Examination reveals temperature 37.6°C, pulse 88 bpm, BP 124/78 mmHg, bilateral hilar lymphadenopathy on chest auscultation, and tender, erythematous nodules on both shins. Blood tests show: Hb 132 g/L, WCC 8.4 × 10⁹/L, platelets 312 × 10⁹/L, ESR 42 mm/hr, CRP 28 mg/L, corrected calcium 2.68 mmol/L, ACE 82 U/L (normal 20-70). Chest X-ray confirms bilateral hilar lymphadenopathy. What is the most likely diagnosis?

A. Tuberculosis
B. Lymphoma
C. Sarcoidosis (Correct Answer)
D. Systemic lupus erythematosus
E. Rheumatoid arthritis with pulmonary involvement

Explanation: ***Sarcoidosis*** - This patient presents with the classic triad of **Löfgren syndrome**: **bilateral hilar lymphadenopathy (BHL)**, **erythema nodosum** (tender nodules on shins), and **arthralgia**. - Laboratory findings of **elevated ACE levels** and **hypercalcemia** (corrected calcium 2.68 mmol/L) strongly support this diagnosis due to granuloma-mediated 1-alpha hydroxylase activity. *Tuberculosis* - While TB can cause hilar lymphadenopathy and fever, it usually presents with more prominent constitutional symptoms like **weight loss** and **night sweats**, and often unilateral adenopathy. - The specific combination of **BHL**, **erythema nodosum**, and **arthralgia** (Löfgren syndrome) is highly characteristic of acute sarcoidosis, making TB less likely. *Lymphoma* - Lymphoma typically presents with **painless, firm lymphadenopathy** and can cause constitutional "B symptoms" such as significant weight loss and drenching night sweats. - Although lymphoma can cause BHL, it does not typically associate with **erythema nodosum** or **elevated ACE** levels. *Systemic lupus erythematosus* - SLE commonly causes **arthralgia** and low-grade fever, but it classically presents with distinct dermatological features such as a **malar rash** or photosensitivity, not erythema nodosum. - **Bilateral hilar lymphadenopathy** is highly atypical for SLE, which more commonly involves other serosal surfaces or interstitial lung disease. *Rheumatoid arthritis with pulmonary involvement* - RA pulmonary involvement usually manifests as **interstitial lung disease**, pleural effusions, or rheumatoid nodules, rather than primarily **bilateral hilar lymphadenopathy**. - While RA causes **arthralgia**, the presence of **erythema nodosum** and **BHL** on chest X-ray points away from RA and directly toward a multisystem granulomatous disease like sarcoidosis.

Question 32: Which of the following pain assessment tools is most appropriate for use in primary care for evaluating a patient with suspected neuropathic pain component in chronic lower back pain?

A. Visual Analogue Scale (VAS)
B. McGill Pain Questionnaire
C. PainDETECT questionnaire (Correct Answer)
D. Brief Pain Inventory (BPI)
E. Numerical Rating Scale (NRS)

Explanation: ***PainDETECT questionnaire*** - This is a validated **screening tool** specifically designed to identify **neuropathic pain components** in patients with chronic lower back pain. - It assesses pain quality through descriptors like **burning**, **tingling**, and **electric shocks**, helping clinicians distinguish between neuropathic and **nociceptive** pain. *Visual Analogue Scale (VAS)* - The VAS is a unidimensional measure primarily used to assess **pain intensity** on a continuous scale. - It lacks the descriptive items necessary to identify the **etiology** or specific **neuropathic features** of the pain. *McGill Pain Questionnaire* - This is a comprehensive tool that provides detailed quantitative measures of pain, but it is **time-consuming** and complex. - It is generally more suited for **specialist pain clinics** or research settings rather than rapid assessment in **primary care**. *Brief Pain Inventory (BPI)* - The BPI is excellent for evaluating **pain severity** and the degree to which pain **interferes with function** and daily life. - While it provides a holistic view of the patient's burden, it does not specifically screen for **neuropathic characteristics** as effectively as PainDETECT. *Numerical Rating Scale (NRS)* - Similar to the VAS, the NRS is used to quantify the **subjective intensity** of pain, usually on a scale of 0 to 10. - It provides no information regarding the **quality or nature** of the pain, making it insufficient for diagnosing a neuropathic component.

Question 33: A 71-year-old woman presents with a 15-week history of fatigue, poor appetite, and 9kg weight loss. She has a history of polymyalgia rheumatica diagnosed 5 years ago, currently controlled on prednisolone 3mg daily. She reports no headache or visual symptoms. Examination reveals temperature 37.4°C, pulse 78 bpm, BP 156/88 mmHg, BMI 21 kg/m², and no temporal artery tenderness. Blood tests show: Hb 108 g/L (normocytic), WCC 7.8 × 10⁹/L, platelets 456 × 10⁹/L, ESR 78 mm/hr, CRP 48 mg/L, albumin 32 g/L. What is the most appropriate initial management?

A. Increase prednisolone to 40-60mg daily for suspected giant cell arteritis relapse
B. Arrange urgent temporal artery biopsy within 7 days
C. Arrange urgent CT chest, abdomen and pelvis to investigate weight loss (Correct Answer)
D. Request temporal artery ultrasound and increase prednisolone to 20mg daily
E. Arrange routine upper and lower gastrointestinal endoscopy

Explanation: ***Arrange urgent CT chest, abdomen and pelvis to investigate weight loss*** - The patient exhibits constitutional symptoms including **significant weight loss (9kg)**, **anaemia of chronic disease**, and **hypoalbuminaemia**, which strongly mandate the exclusion of **malignancy** despite her stable PMR. - According to **NICE guidelines**, an unexplained weight loss of this magnitude in an elderly patient requires **urgent cross-sectional imaging** to screen for abdominal or thoracic occult cancers. *Increase prednisolone to 40-60mg daily for suspected giant cell arteritis relapse* - High-dose steroids are reserved for **Giant Cell Arteritis (GCA)**, which typically presents with **new headache**, **jaw claudication**, or **visual disturbances**, none of which are present here. - Empirical high-dose steroids can mask symptoms of an underlying **malignancy** and worsen the clinical outcome if the diagnosis is delayed. *Arrange urgent temporal artery biopsy within 7 days* - A **temporal artery biopsy** is an invasive diagnostic tool for GCA; however, the clinical examination specifically noted a **lack of temporal artery tenderness** and no cranial symptoms. - Performing a biopsy is inappropriate when the clinical picture is dominated by **weight loss and systemic symptoms** rather than localized vasculitis. *Request temporal artery ultrasound and increase prednisolone to 20mg daily* - **Temporal artery ultrasound** is used as a first-line investigation in many centers for GCA, but it is not indicated as this patient lacks **cranial features** of the disease. - Increasing the dose to **20mg daily** might treat a PMR flare but does not address the primary concern of potential **malignancy** suggested by the weight loss. *Arrange routine upper and lower gastrointestinal endoscopy* - While **gastrointestinal malignancy** is a possibility, a **routine** referral is inappropriate given the **urgent (2-week wait)** nature of significant weight loss and high ESR. - A **CT scan** provides a much broader initial screen for various primary sites (lung, pancreas, ovaries, renal, colorectal) compared to a specific luminal investigation like endoscopy.

Question 34: A 43-year-old woman presents with a 12-week history of right upper quadrant pain described as dull and constant, rated 6/10 in severity. The pain is not related to eating and is associated with fatigue and night sweats. She takes no regular medications. Examination reveals temperature 37.8°C, pulse 88 bpm, BP 128/82 mmHg, and mild right upper quadrant tenderness without guarding. Murphy's sign is negative. Blood tests show: Hb 118 g/L, WCC 7.2 × 10⁹/L, platelets 388 × 10⁹/L, ALT 42 U/L, ALP 136 U/L, bilirubin 14 µmol/L, CRP 34 mg/L. Urinalysis is normal. What is the most appropriate next investigation?

A. Hepatitis B and C serology
B. Upper gastrointestinal endoscopy
C. Ultrasound scan of the abdomen (Correct Answer)
D. CT chest, abdomen and pelvis with contrast
E. MRCP to assess biliary tree

Explanation: ***Ultrasound scan of the abdomen***- Abdominal ultrasound is the **first-line investigation** for right upper quadrant pain, effectively screening the liver, gallbladder, bile ducts, and kidneys for masses, stones, or abscesses.- The patient exhibits concerning features such as **night sweats**, **fatigue**, low-grade fever, and **raised CRP**, necessitating imaging to exclude occult malignancy, chronic infection, or other structural pathology.*Hepatitis B and C serology*- While **ALT** is mildly elevated, viral hepatitis usually presents with a more significant transaminase rise and is less likely to cause constant localized pain and high inflammatory markers without other liver dysfunction.- Serology does not provide the crucial **structural information** needed to investigate potential masses, abscesses, or biliary pathology indicated by the clinical presentation.*Upper gastrointestinal endoscopy*- This patient's pain is localized to the **right upper quadrant** rather than the epigastrium, making peptic ulcer disease or gastric pathology less probable as the primary cause.- Endoscopy cannot explain the **raised ALP** or constitutional symptoms like night sweats in the absence of typical upper GI symptoms like dysphagia, severe reflux, or upper GI bleeding.*CT chest, abdomen and pelvis with contrast*- Although a CT is superior for staging **malignancy** and providing detailed anatomical views, it involves significant radiation and is typically reserved for after an initial **ultrasound** identifies an abnormality or if clinical suspicion remains high after a normal ultrasound.- Ultrasound is more accessible, cost-effective, and safe as the **initial screening tool** for undifferentiated RUQ pain in a primary care or outpatient setting.*MRCP to assess biliary tree*- **MRCP** is a specialized test for detailed visualization of the **biliary tree** when there is a high suspicion of choledocholithiasis, cholangitis, or primary sclerosing cholangitis.- The clinical picture, including **night sweats** and **raised CRP**, suggests a broader range of pathology, including parenchymal liver disease or an abscess, which is better initially screened via a comprehensive abdominal ultrasound.

Question 35: A 68-year-old man with COPD on long-term oxygen therapy presents with a 10-week history of worsening fatigue, reduced appetite, and 5kg weight loss. He reports increased breathlessness despite compliance with medications. Examination shows temperature 37.2°C, pulse 96 bpm, BP 142/86 mmHg, oxygen saturation 89% on 2L/min oxygen, respiratory rate 22/min, and cachexia. Chest examination reveals reduced air entry bilaterally with wheeze. What is the most important next investigation to arrange?

A. Spirometry to assess COPD progression
B. Chest X-ray to exclude lung malignancy or infection (Correct Answer)
C. CT pulmonary angiogram to exclude pulmonary embolism
D. Sputum culture and blood tests including CRP
E. Echocardiogram to assess for cor pulmonale

Explanation: ***Chest X-ray to exclude lung malignancy or infection*** - In a patient with **COPD** and a significant smoking history presenting with **unexplained weight loss**, **fatigue**, and worsening breathlessness over 10 weeks, **lung malignancy** must be urgently excluded as the primary differential. - A **Chest X-ray** is the most important initial imaging investigation to screen for suspicious masses, infiltrates, or effusions, which are crucial for detecting potential cancer or severe infection. *Spirometry to assess COPD progression* - While useful for monitoring COPD, **spirometry** is not the most urgent investigation for **red flag symptoms** like significant weight loss and cachexia. - It assesses **airflow obstruction** but cannot diagnose underlying structural pathologies such as a tumor, which is a major concern here. *CT pulmonary angiogram to exclude pulmonary embolism* - **CTPA** is primarily indicated for more acute presentations of breathlessness and suspected **pulmonary embolism**, rather than a subacute 10-week history with prominent constitutional symptoms. - The patient lacks typical signs of **DVT** or acute cardiorespiratory distress that would prioritize a PE diagnosis over potential malignancy. *Sputum culture and blood tests including CRP* - These tests are helpful for identifying **infections** and inflammation, but they do not provide the necessary structural information to rule out a tumor in a high-risk patient with **unexplained weight loss**. - The severity of **cachexia** and weight loss suggests a more serious underlying condition than a typical COPD exacerbation requiring only microbiological and inflammatory markers. *Echocardiogram to assess for cor pulmonale* - **Cor pulmonale** is a chronic complication of COPD, but it typically presents with signs of right heart failure, such as **peripheral edema** or elevated JVP, which are not the dominant features in this case. - An **echocardiogram** would not explain the patient's significant **unexplained weight loss** and cachexia, making it a lower priority compared to urgent imaging for malignancy.

Question 36: A 52-year-old woman presents with a 16-week history of severe fatigue and widespread pain affecting her neck, back, shoulders, and thighs. Pain is worse in the morning and improves with activity. She reports poor sleep quality, waking frequently. Examination shows widespread tenderness but no synovitis, muscle weakness, or neurological signs. Blood tests show: Hb 128 g/L, WCC 6.2 × 10⁹/L, platelets 242 × 10⁹/L, ESR 8 mm/hr, CRP 3 mg/L, TSH 2.4 mU/L, calcium 2.32 mmol/L, vitamin D 42 nmol/L. What is the most appropriate initial management approach?

A. Arrange urgent rheumatology referral for suspected polymyalgia rheumatica
B. Request creatine kinase and consider inflammatory myopathy
C. Initiate trial of prednisolone 15mg daily for 1 week
D. Provide education about fibromyalgia, recommend graded exercise programme and consider amitriptyline (Correct Answer)
E. Prescribe high-dose vitamin D supplementation 20,000 units weekly

Explanation: ***Provide education about fibromyalgia, recommend graded exercise programme and consider amitriptyline*** - The clinical picture of **chronic widespread pain**, **fatigue**, and **non-restorative sleep**, coupled with **widespread tenderness** and crucially **normal inflammatory markers** (ESR, CRP), is highly characteristic of **fibromyalgia**. - Initial management for fibromyalgia emphasizes **patient education**, **graded exercise programs**, and pharmacological interventions like **low-dose tricyclic antidepressants** (e.g., amitriptyline) to improve sleep and reduce pain. *Arrange urgent rheumatology referral for suspected polymyalgia rheumatica* - **Polymyalgia rheumatica (PMR)** typically affects individuals over 50 and presents with pain and stiffness in the shoulder and hip girdles, but it is characteristically associated with **markedly elevated ESR and CRP**, which are normal in this patient. - While a rheumatology referral might eventually be considered for diagnostic confirmation, it's not urgent and not the initial step when inflammatory markers are normal and the presentation doesn't fully align with PMR. *Request creatine kinase and consider inflammatory myopathy* - **Inflammatory myopathies** (e.g., polymyositis, dermatomyositis) are characterized by **objective muscle weakness**, often proximal, which is explicitly stated to be absent in this patient's examination. - Although **creatine kinase (CK)** is the diagnostic test for muscle inflammation, the lack of muscle weakness and presence of widespread pain without objective signs makes myopathy less likely than fibromyalgia. *Initiate trial of prednisolone 15mg daily for 1 week* - **Corticosteroids** like prednisolone are the cornerstone treatment for inflammatory conditions such as **polymyalgia rheumatica**, but they are **ineffective for fibromyalgia** and carry risks of significant side effects. - Given the **normal inflammatory markers** (ESR, CRP) in this patient, there is no evidence to support an inflammatory diagnosis that would warrant a trial of steroids. *Prescribe high-dose vitamin D supplementation 20,000 units weekly* - The patient has **vitamin D insufficiency** (42 nmol/L), but this level is unlikely to cause such severe and widespread pain and fatigue as the primary etiology. - While correcting vitamin D insufficiency is generally beneficial for overall health, it is a supportive measure and not the primary treatment addressing the **central sensitization** and other complex mechanisms underlying fibromyalgia.

Question 37: A 64-year-old woman presents with a 14-week history of fatigue and 8kg unintentional weight loss. She describes abdominal discomfort and early satiety. Examination reveals BMI 24 kg/m², pulse 84 bpm, BP 136/84 mmHg, and fullness in the left upper quadrant. Blood tests show: Hb 102 g/L, WCC 68 × 10⁹/L (neutrophils 52 × 10⁹/L, lymphocytes 6 × 10⁹/L, metamyelocytes and myelocytes present), platelets 524 × 10⁹/L, LDH 680 U/L. Blood film shows left shift with basophilia. What is the most likely diagnosis?

A. Acute myeloid leukaemia
B. Chronic myeloid leukaemia (Correct Answer)
C. Chronic lymphocytic leukaemia
D. Essential thrombocythaemia
E. Myelofibrosis

Explanation: ***Chronic myeloid leukaemia*** - The clinical triad of **splenomegaly** (fullness in the left upper quadrant and early satiety), massive **leucocytosis** (WCC 68 × 10⁹/L), and a blood film showing a **left shift** with **basophilia** is classic for CML. - The presence of the full spectrum of myeloid maturation, including **metamyelocytes** and **myelocytes**, further supports the diagnosis of chronic phase CML. *Acute myeloid leukaemia* - AML typically presents acutely with features of **bone marrow failure** like severe anaemia, infections, or bleeding, and the blood film would show a high percentage of **blasts** (>20%). - Unlike CML, AML does not usually present with the full range of maturing myeloid cells (left shift) or significant **basophilia**, but rather a predominance of immature blast cells. *Chronic lymphocytic leukaemia* - CLL is characterized by a persistent **mature lymphocytosis** with absolute lymphocyte count typically >5 × 10⁹/L, whereas this patient has a predominant **neutrophilia** and myeloid left shift. - Physical examination in CLL often reveals widespread **lymphadenopathy** in addition to potential splenomegaly, which is not the primary finding described here. *Essential thrombocythaemia* - ET is primarily characterized by a sustained elevation in **platelets** (>450 × 10⁹/L) without a significant increase in the total white cell count or a left shift. - While this patient has significant **thrombocytosis** (524 × 10⁹/L), the massive **leucocytosis (68 × 10⁹/L)** and myeloid left shift with basophilia strongly argue against ET as the primary diagnosis. *Myelofibrosis* - Myelofibrosis typically presents with a **leucoerythroblastic blood film** containing nucleated red blood cells and characteristic **teardrop-shaped erythrocytes** (dacrocytes). - Although it causes **massive splenomegaly**, it is often associated with significant **marrow fibrosis** and can lead to cytopenias, rather than the massive neutrophilic leucocytosis with full maturation seen here.

Question 38: A 34-year-old man presents with an 8-week history of daily fever peaking at 39.2°C, associated with severe night sweats requiring change of bedclothes, and 7kg weight loss. He returned from volunteering in rural India 4 months ago. Examination reveals temperature 38.6°C, pulse 96 bpm, BP 118/76 mmHg, and splenomegaly (4cm below costal margin). No lymphadenopathy. Blood tests show: Hb 118 g/L, WCC 3.8 × 10⁹/L, platelets 142 × 10⁹/L, CRP 68 mg/L. Chest X-ray is normal. Three sets of blood cultures are negative. What is the most appropriate next investigation?

A. HIV test, hepatitis serology, and autoimmune screen
B. CT chest, abdomen and pelvis with contrast
C. Bone marrow aspirate and trephine biopsy
D. Visceral leishmaniasis serology and PCR (Correct Answer)
E. Tuberculosis interferon-gamma release assay (IGRA) and sputum microscopy

Explanation: ***Visceral leishmaniasis serology and PCR*** - The patient presents with the classic triad of **Kala-azar (visceral leishmaniasis)**: prolonged fever, weight loss, and **splenomegaly**, especially after travel to an endemic area like **rural India**. - Lab findings of **pancytopenia** (low Hb, WCC, and platelets) and high CRP are characteristic due to splenic sequestration and marrow infiltration; non-invasive **serology (rK39)** and **PCR** are the preferred initial diagnostic steps. *HIV test, hepatitis serology, and autoimmune screen* - While **HIV** can present with fever and weight loss, it would not typically cause isolated massive **splenomegaly** and pancytopenia without prominent lymphadenopathy or other opportunistic infections. - These tests are part of a general **Fever of Unknown Origin (FUO)** workup but are less specific and targeted than testing for an endemic parasite given the clear travel history. *CT chest, abdomen and pelvis with contrast* - Imaging would confirm **splenomegaly** and check for occult malignancy or abscesses, but it cannot provide a microbiological or pathological diagnosis. - It is a secondary investigation in FUO and is less efficient than targeted infectious disease testing for a patient with clear **geographical risk factors** for a specific parasitic infection. *Bone marrow aspirate and trephine biopsy* - This is a definitive test that can show **Leishmania amastigotes** (Donovan bodies) directly, but it is invasive and usually reserved if **serology** or PCR is inconclusive or if there's high suspicion of hematological malignancy. - While highly accurate, less invasive diagnostic methods are typically pursued first in the diagnostic algorithm for suspected visceral leishmaniasis. *Tuberculosis interferon-gamma release assay (IGRA) and sputum microscopy* - **Miliary tuberculosis** can cause fever, weight loss, and splenomegaly, but the **normal chest X-ray** and lack of respiratory symptoms make it less likely than a parasitic cause in this context. - While **IGRA** can detect latent TB, it does not confirm active disease, and **sputum microscopy** is primarily for pulmonary TB, which is not suggested here.

Question 39: According to NICE guidance on assessing unexplained weight loss in adults in primary care, which of the following clinical features would warrant a 2-week wait referral specifically suspecting colorectal cancer in a 55-year-old patient with 8kg weight loss over 10 weeks?

A. Microcytic anaemia with haemoglobin 105 g/L and MCV 72 fL (Correct Answer)
B. Raised inflammatory markers with CRP 45 mg/L and ESR 62 mm/hr
C. New onset constipation and bloating over the same time period
D. Family history of colorectal cancer in father diagnosed at age 68
E. Digital rectal examination showing smooth, mildly enlarged prostate

Explanation: ***Microcytic anaemia with haemoglobin 105 g/L and MCV 72 fL***- According to **NICE NG12** guidelines, a 2-week wait referral for suspected **colorectal cancer** is indicated for patients aged 40 and over with unexplained **weight loss** and **iron-deficiency anaemia**.- The combination of **unexplained weight loss** and **microcytic anaemia** in a 55-year-old patient has a high positive predictive value for gastrointestinal malignancy.*Raised inflammatory markers with CRP 45 mg/L and ESR 62 mm/hr*- While **elevated inflammatory markers** can be seen in malignancy or chronic disease, they are **non-specific** and not a defined criterion for an urgent 2-week wait referral for colorectal cancer.- These markers require further investigation for **infection**, **inflammation**, or malignancy but do not point specifically to the colon.*New onset constipation and bloating over the same time period*- NICE criteria for suspected colorectal cancer prioritize a change in bowel habit toward **looser or more frequent stools**, rather than isolated constipation or bloating.- **Constipation** alone in this age group, even with weight loss, does not meet the specific threshold for an urgent 2-week wait referral unless a palpable mass is present.*Family history of colorectal cancer in father diagnosed at age 68*- A single first-degree relative diagnosed with colorectal cancer over the **age of 60** is considered low risk and does not meet the criteria for urgent referral.- Urgent investigation is usually triggered by symptoms or **stronger hereditary patterns** (e.g., multiple young-onset relatives) rather than a single late-onset case.*Digital rectal examination showing smooth, mildly enlarged prostate*- A **smoothly enlarged prostate** is a common finding of Benign Prostatic Hyperplasia (BPH) and is unrelated to **colorectal malignancy**.- This clinical finding does not explain the patient's **unexplained weight loss** or warrant a referral for suspected bowel cancer.

Question 40: A 46-year-old woman presents with a 15-week history of fatigue and intermittent fevers. She reports joint pains affecting hands and wrists, a photosensitive rash on her face, and oral ulcers. Examination reveals malar rash, synovitis in MCPJs and wrists bilaterally. Blood tests show: Hb 108 g/L, WCC 3.2 × 10⁹/L, platelets 118 × 10⁹/L, ESR 58 mm/hr, CRP 12 mg/L (normal <5). Urinalysis shows protein 2+ and blood 1+. What is the most appropriate next step?

A. Request anti-CCP antibodies and rheumatoid factor
B. Request ANA, anti-dsDNA, and complement levels (Correct Answer)
C. Start prednisolone 40mg daily and arrange rheumatology follow-up
D. Request blood cultures and chest X-ray for fever investigation
E. Arrange renal ultrasound to investigate haematuria and proteinuria

Explanation: ***Request ANA, anti-dsDNA, and complement levels*** - The patient exhibits classic clinical features of **Systemic Lupus Erythematosus (SLE)**, including a **malar rash**, **oral ulcers**, and **photosensitivity**, making **ANA** the mandatory entry criterion for diagnosis. - Supporting lab findings like **cytopenias**, a high **ESR** with a relatively low **CRP**, and **proteinuria** (suggesting **lupus nephritis**) necessitate testing for **anti-dsDNA** and **complement levels (C3/C4)** to confirm diagnosis and assess disease activity. *Request anti-CCP antibodies and rheumatoid factor* - While the patient has **synovitis**, the presence of multi-system involvement (rash, ulcers, renal signs) makes SLE much more likely than **Rheumatoid Arthritis**. - **Anti-CCP** is highly specific for RA but does not explain the broader symptoms like **leukopenia** or **malar rash**. *Start prednisolone 40mg daily and arrange rheumatology follow-up* - Starting high-dose steroids before confirming a diagnosis can mask findings and should be avoided unless the patient is acutely unstable. - Definitive **serological confirmation** and further investigation of **renal involvement** are required to guide appropriate long-term immunosuppressive therapy. *Request blood cultures and chest X-ray for fever investigation* - While fevers require caution, the presence of a **malar rash** and **joint pains** suggests that the fever is a constitutional symptom of **active SLE** rather than an infection. - These tests may be supplemental, but the priority is establishing the underlying **autoimmune diagnosis** given the multisystem presentation. *Arrange renal ultrasound to investigate haematuria and proteinuria* - A renal ultrasound is useful to rule out structural issues, but the priority in this systemic context is identifying **lupus nephritis** via serology and likely a **renal biopsy**. - Proteinuria and hematuria in a young woman with a **malar rash** are highly suggestive of **glomerular disease** rather than structural abnormalities detectable by ultrasound.

Question 41: A 58-year-old man presents with a 12-week history of fatigue and 6kg weight loss. He is a current smoker (30 pack-years) and consumes 30 units of alcohol weekly. Examination shows pulse 92 bpm, BP 142/88 mmHg, mild hepatomegaly (3cm below costal margin), and palmar erythema. Blood tests reveal: Hb 138 g/L, MCV 102 fL, platelets 156 × 10⁹/L, ALT 124 U/L, AST 186 U/L, ALP 142 U/L, GGT 298 U/L, bilirubin 32 µmol/L, albumin 36 g/L. What is the most important next investigation?

A. Abdominal ultrasound scan (Correct Answer)
B. Upper gastrointestinal endoscopy
C. CT chest, abdomen and pelvis
D. Liver fibroscan and hepatitis serology
E. Colonoscopy

Explanation: ***Abdominal ultrasound scan*** - The patient presents with clear signs of **chronic liver disease** (palmar erythema, hepatomegaly) and findings suggestive of **cirrhosis** (macrocytosis, mild thrombocytopenia, AST:ALT ratio >1, elevated GGT). - Given the significant **weight loss**, history of **alcohol misuse**, and **smoking**, there is a high suspicion for **hepatocellular carcinoma (HCC)**, making an **abdominal ultrasound** the most important initial investigation for screening liver lesions. *Upper gastrointestinal endoscopy* - While useful to screen for **esophageal varices** in patients with established **cirrhosis**, it is not the primary investigation for systemic symptoms like **weight loss** or to evaluate for a **liver mass**. - It would be prioritized for acute GI bleeding or direct suspicion of upper GI malignancy, which are not the leading concerns here. *CT chest, abdomen and pelvis* - A **CT scan** provides detailed anatomical information, but an **abdominal ultrasound** is generally the **first-line, cost-effective, and less invasive** screening tool for suspected liver lesions. - It is usually reserved for further characterization of abnormalities found on ultrasound, or for **staging of confirmed malignancy**, not as the initial screening step. *Liver fibroscan and hepatitis serology* - **Liver fibroscan** assesses **liver stiffness** to quantify fibrosis, and **hepatitis serology** identifies viral causes of liver disease (e.g., HBV, HCV). - These investigations are crucial for full liver assessment but do not directly address the urgent need to **exclude a malignancy** given the patient's **weight loss** and risk factors. *Colonoscopy* - **Colonoscopy** would be indicated if there were symptoms such as altered bowel habits, rectal bleeding, or unexplained **iron-deficiency anemia**, suggesting **colorectal cancer**. - The patient's clinical presentation, including pronounced **liver function test abnormalities** and physical signs of liver disease, points much more strongly towards a **primary liver pathology**.

Question 42: A 41-year-old woman presents with a 9-week history of fatigue and 5kg unintentional weight loss. She reports increased thirst and urinary frequency. Examination reveals BMI 23 kg/m², pulse 88 bpm, BP 128/82 mmHg. Mucous membranes are dry. Fundoscopy is normal. Random glucose is 16.2 mmol/L. Urinalysis shows glycosuria and ketonuria (2+). HbA1c is 87 mmol/mol (10.1%). What is the most appropriate immediate management?

A. Same-day assessment for potential diabetic ketoacidosis (Correct Answer)
B. Start metformin 500mg twice daily and review in 2 weeks
C. Arrange urgent diabetes nurse specialist review within 1 week
D. Start basal-bolus insulin regimen in primary care with next-day review
E. Arrange oral glucose tolerance test to confirm diabetes type

Explanation: ***Same-day assessment for potential diabetic ketoacidosis***- The presence of **significant ketonuria (2+)** along with **hyperglycemia** (random glucose 16.2 mmol/L, HbA1c 10.1%) and symptoms like polyuria, polydipsia, and weight loss, strongly indicates impending or established **diabetic ketoacidosis (DKA)**.- DKA is a life-threatening medical emergency requiring immediate hospitalization for urgent investigations (e.g., blood gases, electrolytes, blood ketones) and initiation of intravenous fluids and insulin therapy.*Start metformin 500mg twice daily and review in 2 weeks*- **Metformin** is contraindicated in patients with significant ketosis or suspected DKA as it does not address the severe insulin deficiency and can worsen metabolic acidosis.- A 2-week delay in management is critically unsafe for a patient with active ketonuria who requires immediate medical intervention.*Arrange urgent diabetes nurse specialist review within 1 week*- A **1-week delay** for review is unsafe when **ketonuria** is present, as the patient's metabolic state could rapidly deteriorate into severe DKA.- While specialist input is vital, the immediate priority is **emergency medical assessment** for DKA, not a delayed outpatient consultation.*Start basal-bolus insulin regimen in primary care with next-day review*- While insulin therapy is indicated, initiating a **basal-bolus insulin regimen** in primary care for a ketotic patient without immediate hospital monitoring of acid-base status, electrolytes, and close glucose/ketone levels is unsafe.- A **next-day review** is insufficient; the patient requires continuous monitoring and management in a hospital setting to safely manage DKA.*Arrange oral glucose tolerance test to confirm diabetes type*- An **Oral Glucose Tolerance Test (OGTT)** is unnecessary and potentially harmful when the diagnosis of diabetes is already confirmed by the random glucose (16.2 mmol/L) and HbA1c (10.1%).- The immediate clinical focus must be on the **management of ketosis** and prevention of DKA, not an elective test to differentiate diabetes subtypes.

Question 43: A 52-year-old homeless man presents with a 16-week history of fever, night sweats, fatigue, and 10kg weight loss. He has a chronic cough productive of blood-streaked sputum. He smokes 20 cigarettes daily and drinks approximately 60 units of alcohol per week. Examination reveals temperature 38.4°C, BMI 18 kg/m², and crackles in the right upper zone. CXR shows right upper lobe cavitation with surrounding infiltrate. He had three previous negative sputum samples for acid-fast bacilli on direct microscopy performed 4 weeks ago by the homeless outreach team. What is the most appropriate next investigation to establish the diagnosis?

A. Sputum culture for Mycobacterium tuberculosis and drug sensitivities (Correct Answer)
B. CT chest with contrast to further characterize the cavitary lesion
C. Bronchoscopy with bronchoalveolar lavage and transbronchial biopsy
D. Repeat sputum samples for acid-fast bacilli microscopy
E. Interferon-gamma release assay (IGRA) blood test

Explanation: ***Sputum culture for Mycobacterium tuberculosis and drug sensitivities*** - In a patient with high clinical suspicion of **pulmonary tuberculosis** (constitutional symptoms, hemoptysis, upper lobe cavitation, risk factors) with previous negative smears, **mycobacterial culture** is the gold standard for definitive diagnosis due to its superior sensitivity. - Culture is essential for identifying the organism and determining **drug sensitivities**, which is critical for guiding appropriate treatment, especially considering the patient's high-risk profile for potential **drug-resistant TB**. *CT chest with contrast to further characterize the cavitary lesion* - While a CT provides detailed anatomical information and can confirm **cavitary disease**, it does not offer the **microbiological confirmation** necessary to establish a definitive diagnosis of tuberculosis and initiate treatment. - Imaging is usually complementary and not the primary diagnostic step when a **microbiological diagnosis** is paramount, or when ruling out other pathologies like **malignancy**. *Bronchoscopy with bronchoalveolar lavage and transbronchial biopsy* - This is an **invasive procedure** that carries risks and is typically reserved for cases where non-invasive methods, such as **sputum cultures**, have failed to yield a diagnosis or if the patient cannot produce sputum. - It is not the appropriate immediate next step given that a more sensitive, non-invasive sputum culture has not been adequately pursued since previous microscopy was negative. *Repeat sputum samples for acid-fast bacilli microscopy* - The patient already had **three negative sputum smears for AFB**; microscopy has a relatively low sensitivity (50-70%) for diagnosing active TB, especially in paucibacillary disease. - Repeating a low-sensitivity test when there is high clinical suspicion is less effective than moving directly to a more sensitive test like **mycobacterial culture**. *Interferon-gamma release assay (IGRA) blood test* - IGRA tests detect **latent tuberculosis infection** by measuring an immune response to *Mycobacterium tuberculosis* antigens and cannot differentiate between latent and **active TB disease**. - Since this patient presents with clear symptoms and radiological evidence of active disease, a test for **active infection** (culture or PCR) is required, not a screening test for exposure.

Question 44: A 46-year-old woman with type 1 diabetes and hypothyroidism presents with a 19-week history of profound fatigue and weakness. She reports increased thirst despite good diabetic control (HbA1c 52 mmol/mol). She has noticed darker skin pigmentation in her palmar creases and has lost 6kg in weight. Blood tests show: Na+ 128 mmol/L, K+ 5.8 mmol/L, urea 8.2 mmol/L, creatinine 98 μmol/L (baseline 82 μmol/L), glucose 4.2 mmol/L (random). Blood pressure is 102/68 mmHg lying and 88/58 mmHg standing. Which investigation would be most appropriate to confirm the underlying diagnosis?

A. 09:00 cortisol level followed by short synacthen test if low (Correct Answer)
B. 24-hour urine free cortisol measurement
C. Serum aldosterone to renin ratio
D. MRI pituitary with contrast
E. Serum ACTH level in isolation

Explanation: ***09:00 cortisol level followed by short synacthen test if low*** - A **09:00 serum cortisol** is the initial screening test for **adrenal insufficiency**. If the result is low or indeterminate, a **short synacthen test** (ACTH stimulation) is crucial to confirm the diagnosis by assessing adrenal reserve. - The patient's **hyperpigmentation**, **hyponatremia**, **hyperkalemia**, and **postural hypotension** are classic signs of **primary adrenal insufficiency (Addison's disease)**, often seen in the context of **autoimmune polyglandular syndrome type 2** given her Type 1 Diabetes and hypothyroidism. *24-hour urine free cortisol measurement* - This investigation is primarily used for the diagnosis of **Cushing's syndrome** (hypercortisolism), not for assessing adrenal insufficiency. - It measures cumulative cortisol excretion over a day, but does not evaluate the adrenal gland's dynamic response to stress or stimulation, which is essential for diagnosing deficiency. *Serum aldosterone to renin ratio* - This ratio is the screening test for **primary hyperaldosteronism (Conn's syndrome)**, which typically presents with **hypertension** and **hypokalemia**. - While adrenal insufficiency involves low aldosterone and high renin, this ratio is not the appropriate initial test to confirm Addison's disease itself, but rather to investigate aldosterone excess. *MRI pituitary with contrast* - This imaging is indicated for investigating **secondary adrenal insufficiency**, where the cause lies in the pituitary gland (e.g., ACTH deficiency). - The presence of **hyperpigmentation** in this patient suggests **primary adrenal insufficiency** (high ACTH stimulating melanocytes), making a pituitary cause less likely as the initial diagnosis. *Serum ACTH level in isolation* - An **elevated ACTH level** is characteristic of **primary adrenal insufficiency**, as the pituitary attempts to stimulate failing adrenal glands. - However, an isolated ACTH level alone is insufficient for confirming adrenal insufficiency; it serves primarily to differentiate between primary and secondary causes once cortisol deficiency has been established by dynamic testing.

Question 45: A 61-year-old man presents with an 18-week history of fatigue, night sweats, and 8kg weight loss. He has generalized pruritus especially after hot baths. Examination reveals cervical and axillary lymphadenopathy, with the largest node measuring 3cm in diameter, rubbery and non-tender. There is no hepatosplenomegaly. Blood tests show: Hb 118 g/L, WCC 8.9 × 10⁹/L, platelets 245 × 10⁹/L, ESR 72 mm/hr, LDH 456 U/L (normal <250). A lymph node biopsy is performed. Which histological finding would be most specific for confirming the most likely diagnosis?

A. Presence of Reed-Sternberg cells in a background of inflammatory cells (Correct Answer)
B. Monotonous population of small mature lymphocytes with proliferation centres
C. Follicular pattern with BCL2-positive centrocytes and centroblasts
D. Diffuse infiltrate of large atypical lymphoid cells with high Ki-67 proliferation index
E. Granulomatous inflammation with caseous necrosis

Explanation: ***Presence of Reed-Sternberg cells in a background of inflammatory cells*** - The patient's presentation of **B symptoms** (weight loss, night sweats), **aquagenic pruritus**, and painless **rubbery lymphadenopathy** is classic for **Hodgkin Lymphoma**. - **Reed-Sternberg cells**, which often have a multi-nucleated "owl's eye" appearance, are the pathognomonic malignant cells surrounded by a reactive **inflammatory milieu**. *Monotonous population of small mature lymphocytes with proliferation centres* - This histological description is characteristic of **Chronic Lymphocytic Leukaemia (CLL)** or **Small Lymphocytic Lymphoma (SLL)**. - While it causes lymphadenopathy, it typically lacks the **aquagenic pruritus** and the mixed inflammatory background seen in Hodgkin Lymphoma. *Follicular pattern with BCL2-positive centrocytes and centroblasts* - This pattern is the hallmark of **Follicular Lymphoma**, which usually follows an indolent course and presents without prominent **inflammatory markers** like a significantly raised ESR. - The **BCL2 expression** here is due to the t(14;18) translocation, which is not the primary driver in Hodgkin Lymphoma. *Diffuse infiltrate of large atypical lymphoid cells with high Ki-67 proliferation index* - This describes **Diffuse Large B-Cell Lymphoma (DLBCL)**, an aggressive non-Hodgkin lymphoma that lacks the specific **Reed-Sternberg** morphology. - While it presents with B symptoms, it does not typically feature the **polymorphic reactive cell background** (eosinophils, plasma cells) characteristic of Hodgkin's. *Granulomatous inflammation with caseous necrosis* - This finding is diagnostic of **Tuberculosis (TB)**, which can cause night sweats, weight loss, and lymphadenopathy. - However, it would not explain the **elevated LDH** or **pruritus after hot baths**, and the nodes are typically "matted" rather than "rubbery."

Question 46: In the assessment of chronic pain in primary care, which statement best describes the concept of 'pain catastrophizing' and its significance in pain management?

A. It refers to severe pain rated 9-10/10 that requires urgent specialist intervention
B. It is a cognitive-emotional process characterized by magnification of pain threat, rumination, and feelings of helplessness that correlates with worse pain outcomes (Correct Answer)
C. It describes pain that has a serious underlying organic cause such as malignancy or infection
D. It is a form of factitious disorder where patients deliberately exaggerate symptoms for secondary gain
E. It refers to acute exacerbation of chronic pain requiring emergency hospital admission

Explanation: ***It is a cognitive-emotional process characterized by magnification of pain threat, rumination, and feelings of helplessness that correlates with worse pain outcomes***- **Pain catastrophizing** is a psychological construct involving an exaggerated negative orientation toward pain, which is a strong predictor of **chronic pain intensity** and disability.- It consists of three main components: **rumination** (constant worry), **magnification** (exaggerating the threat), and **helplessness** (feeling unable to manage the pain).*It refers to severe pain rated 9-10/10 that requires urgent specialist intervention*- While catastrophizing individuals may report higher pain scores, the term specifically describes the **cognitive-emotional response** to pain, not the numerical intensity level itself.- It does not automatically necessitate specialist intervention as it can often be managed in **primary care** using psychosocial strategies.*It describes pain that has a serious underlying organic cause such as malignancy or infection*- Pain with a serious underlying cause is referred to as having **'red flags'**, whereas catastrophizing is a psychological factor known as a **'yellow flag'**.- Catastrophizing can occur in both **nociceptive** and **nociplastic** pain scenarios, independent of the underlying organic pathology.*It is a form of factitious disorder where patients deliberately exaggerate symptoms for secondary gain*- Unlike **factitious disorder** or malingering, pain catastrophizing is a genuine, involuntary psychological response and is not a deliberate attempt to deceive for **secondary gain**.- Clinicians must recognize it as a legitimate medical finding that requires **empathetic management** rather than suspicion of dishonesty.*It refers to acute exacerbation of chronic pain requiring emergency hospital admission*- **Acute-on-chronic pain** exacerbations are clinical events, while catastrophizing is a persistent **cognitive trait** or state that influences how patients perceive those events.- High levels of catastrophizing may lead to increased healthcare utilization, but the term does not define the **clinical severity** or the need for hospitalization.

Question 47: A 73-year-old woman presents with a 17-week history of fatigue and unintentional weight loss of 9kg. She reports early satiety and occasional night sweats. She has had no fever. On examination, there is marked splenomegaly extending 8cm below the left costal margin. Blood tests show: Hb 89 g/L, MCV 92 fL, WCC 78.4 × 10⁹/L (neutrophils 52.1, lymphocytes 4.2, monocytes 3.8, eosinophils 3.4, basophils 2.1, myelocytes 8.6, metamyelocytes 4.2), platelets 612 × 10⁹/L. Blood film shows left shift of myeloid series with all stages of granulocyte maturation. What is the most appropriate next step in confirming the diagnosis?

A. Bone marrow aspirate and trephine biopsy
B. BCR-ABL1 fusion gene testing by PCR or FISH (Correct Answer)
C. Flow cytometry on peripheral blood
D. JAK2 V617F mutation analysis
E. Abdominal ultrasound to confirm splenomegaly

Explanation: ***BCR-ABL1 fusion gene testing by PCR or FISH*** - The patient's presentation of **massive splenomegaly**, extremely high **white cell count** with a **left shift** (myelocytes, metamyelocytes, basophils), and **thrombocytosis** is classic for **Chronic Myeloid Leukaemia (CML)**. - Detection of the **BCR-ABL1 fusion gene**, which results from the **Philadelphia chromosome t(9;22)**, is the diagnostic hallmark and essential for confirming CML and guiding **Tyrosine Kinase Inhibitor (TKI)** therapy. *Bone marrow aspirate and trephine biopsy* - While often performed to assess **disease phase** and exclude a **blast crisis**, it is not the initial definitive diagnostic test for CML if peripheral blood molecular testing is available. - The definitive diagnosis of **CML** can often be made faster and less invasively through molecular testing on peripheral blood. *Flow cytometry on peripheral blood* - This technique is primarily utilized for identifying specific cell surface markers in **lymphoid malignancies** like **CLL** or **acute leukemias**. - It is not the investigative tool of choice for diagnosing **myeloproliferative neoplasms** like CML, which require genetic/molecular confirmation of the driving mutation. *JAK2 V617F mutation analysis* - This mutation is typically associated with other **myeloproliferative neoplasms** such as **Polycythaemia Vera**, **Essential Thrombocythaemia**, and **Primary Myelofibrosis**. - It is usually absent in **CML**, and the specific peripheral blood findings here (prominent granulocytic left shift with basophilia) strongly point towards CML over other Ph-negative MPNs. *Abdominal ultrasound to confirm splenomegaly* - The splenomegaly in this patient is already **clinically evident and marked (8cm below the costal margin)**, so imaging is not required for confirmation. - Ultrasound provides no information regarding the **underlying hematological etiology**, which is the critical next step in managing this patient with progressive symptoms.

Question 48: A 27-year-old woman presents with an 11-week history of fatigue, low-grade fever (37.6-38.1°C), and a 5kg weight loss. She reports intermittent diarrhoea and crampy abdominal pain. She returned from a 3-month backpacking trip through South East Asia 5 months ago. Examination reveals mild tenderness in the right iliac fossa. Blood tests show: Hb 102 g/L, MCV 78 fL, WCC 11.4 × 10⁹/L (neutrophils 7.8, lymphocytes 2.1, eosinophils 1.2), CRP 45 mg/L, albumin 32 g/L. Stool microscopy shows no ova, cysts or parasites. What is the most appropriate next investigation?

A. Faecal calprotectin and consideration of colonoscopy (Correct Answer)
B. Repeat stool microscopy for ova, cysts and parasites on three separate samples
C. HIV test and CD4 count
D. Small bowel MRI to assess for Crohn's disease
E. Mantoux test and interferon-gamma release assay for tuberculosis

Explanation: ***Faecal calprotectin and consideration of colonoscopy*** - The patient's chronic symptoms (fatigue, weight loss, low-grade fever, diarrhoea, crampy abdominal pain) along with **right iliac fossa tenderness**, **microcytic anaemia**, **elevated CRP**, and **hypoalbuminaemia** strongly indicate **inflammatory bowel disease (IBD)**, particularly **Crohn's disease**. - **Faecal calprotectin** is a sensitive non-invasive marker of intestinal inflammation, guiding the need for definitive diagnosis via **colonoscopy with ileoscopy**, which allows for direct visualization and **biopsy** of the affected bowel, including the crucial **terminal ileum**. *Repeat stool microscopy for ova, cysts and parasites on three separate samples* - While travel to South East Asia is a risk factor, the significant **systemic inflammation** (high CRP, low albumin, anaemia) and the chronicity make a simple parasitic infection less likely than IBD, especially with an initial negative stool test. - The **mild eosinophilia** is non-specific and not strong evidence for a parasitic infection in the context of other markers pointing towards a profound inflammatory process. *HIV test and CD4 count* - Although fatigue and weight loss can be seen in **HIV**, the specific localized gastrointestinal symptoms like **crampy abdominal pain**, **diarrhoea**, and **right iliac fossa tenderness**, along with high inflammatory markers, point more directly to an inflammatory bowel pathology. - This investigation, while relevant in a comprehensive work-up, is not the *most appropriate next investigation* for the primary gastrointestinal complaint in this clinical context. *Small bowel MRI to assess for Crohn's disease* - **Small bowel MRI** is highly effective for assessing the extent of small bowel disease and complications in **Crohn's disease**, such as strictures or fistulae. - However, it does not provide **histological diagnosis**, which is the gold standard for confirming IBD and differentiating it from other conditions. **Colonoscopy with ileoscopy** is usually the initial step for tissue diagnosis. *Mantoux test and interferon-gamma release assay for tuberculosis* - **Intestinal tuberculosis** can clinically mimic **Crohn's disease**, especially in regions where TB is endemic or with a travel history; however, these tests only indicate prior exposure to **Mycobacterium tuberculosis** and not active disease or the site of infection. - Definitive diagnosis of intestinal TB requires **biopsy** and culture, which can be obtained during **colonoscopy**, making direct investigation of the bowel the most appropriate immediate step.

Question 49: A 55-year-old man with metastatic pancreatic cancer presents for pain review. He reports constant deep epigastric and back pain currently controlled at 6/10 on morphine sulfate modified release 60mg twice daily. He experiences breakthrough pain 3-4 times daily, each episode lasting 30-45 minutes and reaching 9/10 severity, usually precipitated by eating. He is using oral morphine immediate release 10mg for breakthrough pain with partial effect. According to current guidance on cancer pain management, what is the most appropriate adjustment to his breakthrough analgesia?

A. Increase breakthrough dose to morphine immediate release 20mg as needed (Correct Answer)
B. Change to subcutaneous morphine 10mg for breakthrough pain for faster onset
C. Add gabapentin 300mg three times daily for neuropathic component
D. Increase background morphine to 90mg twice daily and keep breakthrough dose at 10mg
E. Switch to fentanyl sublingual or buccal preparation for breakthrough pain

Explanation: ***Increase breakthrough dose to morphine immediate release 20mg as needed***- The standard clinical guideline for **breakthrough pain** is to prescribe a dose equivalent to **one-sixth (1/6th)** of the total 24-hour background opioid dose.- Given the patient takes **morphine sulfate modified release 60mg twice daily** (total 120mg daily), the appropriate breakthrough dose is **20mg** (1/6th of 120mg), which should provide better relief than the current 10mg.*Change to subcutaneous morphine 10mg for breakthrough pain for faster onset*- **Subcutaneous administration** is primarily indicated when the **oral route is not feasible** (e.g., severe nausea/vomiting, dysphagia, or bowel obstruction), which is not stated in this case.- While subcutaneous administration may offer a slightly faster onset, the current issue is **inadequate dose** of the oral immediate-release morphine, not necessarily the route or speed of onset, as the pain lasts 30-45 minutes.*Add gabapentin 300mg three times daily for neuropathic component*- **Gabapentin** is an adjuvant typically used for **neuropathic pain**, which is characterized by descriptions such as burning, shooting, or tingling sensations, not the deep, constant epigastric and back pain reported here.- The patient's pain, described as deep epigastric and back pain, is consistent with **visceral pain** from pancreatic cancer, which responds primarily to opioid analgesia.*Increase background morphine to 90mg twice daily and keep breakthrough dose at 10mg*- The patient's **background pain is currently controlled at 6/10**, indicating that the current background dose is largely adequate and a significant increase may lead to **excessive sedation** or side effects.- Keeping the breakthrough dose at 10mg while increasing the background dose would still leave the **breakthrough pain undertreated**, as 10mg is demonstrably ineffective and not proportional to the total daily dose.*Switch to fentanyl sublingual or buccal preparation for breakthrough pain*- **Rapid-onset opioids (ROOs)** like sublingual or buccal fentanyl are typically considered for **refractory breakthrough pain** after oral immediate-release opioids have been adequately titrated and optimized.- There is still an opportunity to optimize the **oral immediate-release morphine dose** to the guideline-recommended 1/6th of the total daily dose before switching to more specialized and potentially more expensive ROOs.

Question 50: A 49-year-old woman presents with a 20-week history of severe fatigue and widespread pain affecting her neck, back, shoulders, and legs. The pain is worse in the morning and improves slightly with gentle movement. She reports poor sleep quality with frequent waking and feels unrefreshed in the morning. She describes 'brain fog' with difficulty concentrating. Examination reveals multiple tender points but no synovitis or muscle weakness. Blood tests including FBC, ESR, CRP, TFTs, vitamin D, and CK are all normal. Using current diagnostic approaches, which feature most strongly supports the diagnosis of fibromyalgia?

A. Presence of 11 out of 18 specific tender points on examination
B. Widespread pain index ≥7 and symptom severity scale score ≥5, with symptoms present for at least 3 months (Correct Answer)
C. Normal inflammatory markers with elevated ESR to CRP ratio
D. Morning stiffness lasting more than 1 hour
E. Symptom improvement with gentle movement and exercise

Explanation: ***Widespread pain index ≥7 and symptom severity scale score ≥5, with symptoms present for at least 3 months*** - The **ACR 2010/2016 diagnostic criteria** for fibromyalgia prioritize the **Widespread Pain Index (WPI)** and **Symptom Severity Scale (SSS)** to capture the full scope of symptoms, including pain, fatigue, poor sleep, and cognitive issues. - A diagnosis requires a WPI ≥7 and SSS ≥5 (or WPI 3-6 and SSS ≥9), with symptoms present for at least **3 months**, and no other condition explaining the pain, which aligns with the patient's presentation. *Presence of 11 out of 18 specific tender points on examination* - This criterion was central to the **1990 ACR classification criteria** for fibromyalgia but is no longer the primary diagnostic method due to its subjectivity and variability in clinical practice. - Current guidelines emphasize the patient's overall symptom experience, measured by the **WPI and SSS**, over a subjective tender point count. *Normal inflammatory markers with elevated ESR to CRP ratio* - **Normal inflammatory markers** (ESR, CRP) are characteristic of fibromyalgia, as it is a non-inflammatory pain syndrome, and their normalcy helps rule out inflammatory conditions. - An **elevated ESR to CRP ratio** is not a recognized diagnostic feature of fibromyalgia; typically, both markers are within normal limits. *Morning stiffness lasting more than 1 hour* - While fibromyalgia patients may experience **morning stiffness**, it usually lasts less than 30-60 minutes. Stiffness prolonged beyond **1 hour** is a hallmark feature of **inflammatory arthritides**, such as rheumatoid arthritis. - The patient's lack of **synovitis** and normal inflammatory markers make an inflammatory disease less likely. *Symptom improvement with gentle movement and exercise* - Improvement of pain with **gentle movement** is a common, but **non-specific**, feature observed in fibromyalgia and other musculoskeletal conditions like ankylosing spondylitis. - This clinical observation alone is not a diagnostic criterion; the diagnosis of fibromyalgia relies on the comprehensive assessment using the **WPI and SSS**.

Question 51: A 64-year-old man with a history of mechanical aortic valve replacement 8 years ago presents with a 7-week history of intermittent fever up to 38.5°C, fatigue, and night sweats. He has lost 4kg in weight. He is compliant with warfarin therapy. On examination, temperature is 38.2°C, pulse 96 bpm regular, BP 142/48 mmHg with a collapsing pulse, and a soft early diastolic murmur is audible. Small painful lesions are noted on two fingertips. Blood tests show: Hb 108 g/L, WCC 13.2 × 10⁹/L, CRP 89 mg/L, creatinine 142 μmol/L (baseline 95 μmol/L). What is the single most important immediate investigation?

A. Transthoracic echocardiography
B. Three sets of blood cultures from different sites before starting antibiotics (Correct Answer)
C. Transoesophageal echocardiography
D. Urinalysis for microscopic haematuria
E. CT coronary angiography

Explanation: ***Three sets of blood cultures from different sites before starting antibiotics***- **Blood cultures** are the single most important immediate diagnostic step as they fulfill a **major Duke criterion** and guide targeted antimicrobial therapy.- Since **bacteraemia** in endocarditis is continuous, multiple sets from distinct sites increase sensitivity and must be drawn before the administration of **antibiotics** to prevent sterile cultures.*Transthoracic echocardiography*- While useful for a quick assessment, it has limited sensitivity (approx. 50%) for detecting **vegetations** or complications in patients with **prosthetic valves**.- It is not the most definitive or immediate priority compared to securing a microbiological diagnosis through cultures.*Transoesophageal echocardiography*- **TOE** is the preferred imaging modality for **prosthetic valve endocarditis** due to its high sensitivity for detecting abscesses and small vegetations.- Although essential for diagnosis, obtaining **blood cultures** takes precedence as the immediate first step to ensure the organism is captured before therapy begins.*Urinalysis for microscopic haematuria*- Microscopic haematuria can support a diagnosis of infective endocarditis by identifying **immunological phenomena** like glomerulonephritis.- It is a supportive finding only and lacks the diagnostic weight and clinical urgency provided by **blood cultures**.*CT coronary angiography*- This investigation is primarily used to evaluate **coronary artery disease** and has no role in the acute diagnosis of **infective endocarditis**.- It would delay the necessary infectious and echocardiographic workup required for a patient with **prosthetic valve** dysfunction and fever.

Question 52: A 36-year-old woman presents with a 15-week history of profound fatigue, low-grade fever (37.5-37.9°C), and generalized myalgia. She works as a nurse and had a viral upper respiratory tract infection 4 months ago from which she feels she has never fully recovered. She reports exercise intolerance with symptom exacerbation after minimal physical activity that lasts for days. Examination and extensive blood tests including FBC, TFTs, CRP, ferritin, coeliac screen, and autoimmune screen are all normal. What is the most appropriate management approach?

A. Refer for graded exercise therapy programme
B. Prescribe a trial of prednisolone 20mg daily
C. Explain diagnosis of chronic fatigue syndrome and offer pacing strategies and supportive management (Correct Answer)
D. Request CT chest, abdomen and pelvis to exclude malignancy
E. Arrange sleep study to exclude sleep apnoea

Explanation: ***Explain diagnosis of chronic fatigue syndrome and offer pacing strategies and supportive management*** - This patient presents with hallmark features of **Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)**, including profound fatigue for over 3 months, **post-exertional malaise**, myalgia, low-grade fever, and normal extensive investigations. - Current guidelines (e.g., NICE 2021) recommend validating the diagnosis, educating patients, and implementing **pacing strategies** (energy management) to prevent symptom exacerbation, alongside supportive symptom management. *Refer for graded exercise therapy programme* - **Graded Exercise Therapy (GET)** is no longer recommended for ME/CFS, as it can worsen symptoms and lead to severe **post-exertional malaise** in many patients. - This approach is largely considered harmful and has been superseded by energy management techniques that respect individual energy envelopes. *Prescribe a trial of prednisolone 20mg daily* - There is no evidence supporting the use of **corticosteroids** in the treatment of ME/CFS, and they carry significant side effects. - With normal inflammatory markers like **CRP** and a negative autoimmune screen, there is no indication for immunosuppression in this context. *Request CT chest, abdomen and pelvis to exclude malignancy* - The extensive **normal blood tests** (FBC, CRP, ferritin) significantly reduce the likelihood of an underlying malignancy. - In the absence of specific red flag symptoms such as unexplained **weight loss**, night sweats, or localized findings, a broad CT scan is not warranted and exposes the patient to unnecessary radiation. *Arrange sleep study to exclude sleep apnoea* - While fatigue is a symptom, the cardinal feature in this case is **post-exertional malaise** following minimal activity, which is not characteristic of **Obstructive Sleep Apnoea (OSA)**. - The patient lacks typical OSA symptoms such as loud **snoring**, witnessed apnoeas, or risk factors like obesity.

Question 53: According to current UK guidance for the assessment of unexplained weight loss in primary care, what percentage of unintentional weight loss over what time period should prompt consideration of urgent investigation for serious underlying disease in adults?

A. Loss of 3% of body weight over 3 months
B. Loss of 5% of body weight over 6-12 months (Correct Answer)
C. Loss of 10% of body weight over 3-6 months
D. Loss of 2% of body weight over 1 month
E. Loss of 7.5% of body weight over 12 months

Explanation: ***Loss of 5% of body weight over 6-12 months***- According to **NICE** guidelines for unexplained weight loss in primary care, an unintentional **5% reduction** in body weight over a period of **6 to 12 months** is the established threshold prompting consideration of urgent investigation for serious underlying disease.- This specific criterion is used to identify patients at higher risk for conditions such as **malignancy**, chronic infections, or endocrine disorders, necessitating a comprehensive diagnostic workup.*Loss of 3% of body weight over 3 months*- A **3% weight loss** over a relatively short period like 3 months is generally not considered the primary trigger for urgent investigation, as it may fall within **normal physiological variation** or be due to minor, self-limiting issues.- UK guidance specifies a **higher percentage** and/or a longer duration to define clinically significant unexplained weight loss.*Loss of 10% of body weight over 3-6 months*- While a **10% weight loss** is indeed a very significant finding and would undoubtedly warrant investigation, it is a much **later indicator** than the 5% threshold.- Current guidelines aim for **earlier detection** and intervention, making the 5% loss the more appropriate initial prompt for consideration of urgent investigation.*Loss of 2% of body weight over 1 month*- A **2% weight loss** over a single month is often attributed to normal **short-term fluctuations** in body weight, changes in fluid balance, or mild transient illnesses.- It does not typically meet the criteria for **unexplained significant weight loss** that necessitates urgent investigation for serious underlying pathology.*Loss of 7.5% of body weight over 12 months*- Although a **7.5% weight loss** over 12 months certainly exceeds the minimum threshold, it is not the specific figure cited as the **primary trigger** for *considering* urgent investigation in UK primary care guidance.- The established benchmark to initiate investigation is **5% weight loss**, as this allows for earlier and more timely assessment.

Question 54: A 71-year-old woman presents with a 13-week history of progressive fatigue and generalized weakness. She reports difficulty rising from chairs and climbing stairs. She has lost 7kg in weight and complains of muscle aches. Examination reveals proximal muscle weakness in both upper and lower limbs, with violaceous discoloration over her eyelids and erythematous papules over the knuckles. Blood tests show: Hb 121 g/L, CRP 42 mg/L, ESR 65 mm/hr, creatine kinase 3,420 U/L (normal <200), ALT 98 U/L. Which investigation should be prioritized to guide management?

A. Electromyography and nerve conduction studies
B. CT chest, abdomen and pelvis (Correct Answer)
C. Muscle biopsy with histology and immunohistochemistry
D. Autoantibody screen including anti-Jo-1 and anti-Mi-2
E. Urgent MRI of the brain and spinal cord

Explanation: ***CT chest, abdomen and pelvis*** - This patient presents with classic features of **dermatomyositis**, including proximal muscle weakness, elevated creatine kinase, violaceous discoloration over the eyelids (**heliotrope rash**), and erythematous papules over the knuckles (**Gottron's papules**). - In a 71-year-old with dermatomyositis and unexplained **weight loss**, there is a high association with **paraneoplastic malignancy**, making an extensive search for cancer a top priority to guide overall management.*Electromyography and nerve conduction studies* - While EMG can demonstrate the **myopathic changes** characteristic of dermatomyositis, such as small, polyphasic motor unit potentials and spontaneous activity, it primarily confirms the diagnosis of myositis. - This investigation does not address the crucial need to screen for an **underlying malignancy**, which is a life-threatening complication and a primary concern in elderly patients with new-onset dermatomyositis.*Muscle biopsy with histology and immunohistochemistry* - A muscle biopsy is the **gold standard** for confirming dermatomyositis, showing characteristic **perifascicular atrophy** and inflammation. - However, given the strong clinical and laboratory evidence for dermatomyositis in an older patient with **weight loss**, the immediate management priority shifts to ruling out an **associated malignancy** rather than solely confirming the muscle pathology.*Autoantibody screen including anti-Jo-1 and anti-Mi-2* - An autoantibody screen, including myositis-specific antibodies like **anti-Jo-1** (associated with interstitial lung disease and arthritis) and **anti-Mi-2** (associated with classic dermatomyositis), helps classify the myositis subtype and predict complications. - While useful for prognostication, these tests do not directly aid in the urgent detection of an **occult malignancy**, which is paramount in this clinical scenario.*Urgent MRI of the brain and spinal cord* - This investigation is not indicated here as the symptoms and signs, including **proximal muscle weakness**, significantly elevated **creatine kinase**, and specific **cutaneous manifestations**, are highly suggestive of a primary muscle disease (myopathy). - There are no features pointing towards a central or peripheral neurological cause requiring neuroimaging, and it would not help in the search for an **underlying malignancy** in the chest or abdomen.

Question 55: A 42-year-old man presents with a 10-week history of intermittent fever up to 38.9°C, associated with rigors and profuse sweating. He returned from a 6-month contract working in Nigeria 4 months ago. He took malaria prophylaxis irregularly. Blood films taken during fever spikes have been negative for malaria parasites on three occasions. He has lost 5kg in weight. Examination shows mild hepatomegaly but is otherwise unremarkable. Initial blood tests show normocytic anaemia (Hb 105 g/L) and raised inflammatory markers (CRP 78 mg/L). What is the most appropriate next step in management?

A. Repeat thick and thin blood films daily for 3 consecutive days
B. Empirical treatment with artemether-lumefantrine
C. Malaria rapid diagnostic test (RDT) only
D. Request PCR testing for Plasmodium species (Correct Answer)
E. CT chest, abdomen and pelvis to investigate fever of unknown origin

Explanation: ***Request PCR testing for Plasmodium species*** - **PCR testing** is significantly more sensitive than microscopy and is the preferred next step when a strong clinical suspicion of malaria persists despite **three negative blood films**. - It is particularly useful for detecting **low-level parasitaemia**, which may occur when a patient has taken irregular prophylaxis or has a chronic presentation after several months. *Repeat thick and thin blood films daily for 3 consecutive days* - While the standard protocol is to perform three films over 72 hours, this patient has **already had three negative films** during fever spikes, making further microscopy less likely to yield a result than more sensitive tests. - Progression to **molecular diagnostics** (PCR) is indicated when microscopy fails to confirm a diagnosis in a high-risk symptomatic traveler. *Empirical treatment with artemether-lumefantrine* - **Empirical treatment** is generally reserved for critically ill patients who cannot wait for diagnostic confirmation; this patient is stable despite his 10-week history. - Modern clinical practice emphasizes **diagnostic confirmation** prior to initiating antimalarials to prevent resistance and ensure the correct species is targeted. *Malaria rapid diagnostic test (RDT) only* - **RDTs** are helpful for quick screening but generally have a lower sensitivity for **low parasite densities** compared to PCR. - Utilizing an RDT alone would be insufficient in this case as it may not provide more information than the three negative microscopy films already obtained. *CT chest, abdomen and pelvis to investigate fever of unknown origin* - Although the patient meets criteria for **Fever of Unknown Origin (FUO)**, common infectious causes linked to travel must be definitively excluded first. - **CT imaging** is a premature and resource-intensive step before completing specialized infectious disease investigations like **PCR** or blood cultures for systemic parasites and bacteria.

Question 56: A 58-year-old woman presents with a 14-week history of unintentional weight loss of 8kg and persistent fatigue. She has no significant past medical history. On examination, she appears pale with blood pressure 118/72 mmHg and pulse 88 bpm regular. Abdominal examination reveals a palpable mass in the left upper quadrant. Blood tests show: Hb 98 g/L (normal 120-150), MCV 76 fL (normal 80-100), ferritin 8 μg/L (normal 15-200), WCC 12.1 × 10⁹/L, platelets 542 × 10⁹/L. What is the single most appropriate next investigation?

A. Urgent CT chest, abdomen and pelvis (Correct Answer)
B. Upper gastrointestinal endoscopy and colonoscopy
C. Bone marrow biopsy
D. FBC repeat in 2 weeks with reticulocyte count
E. Faecal immunochemical test (FIT)

Explanation: ***Urgent CT chest, abdomen and pelvis*** - The patient presents with multiple **red flag features** including significant unintentional **weight loss**, a **palpable abdominal mass**, and severe **iron deficiency anemia**, strongly suggesting an underlying **malignancy**. - A **CT scan of the chest, abdomen, and pelvis** is the most appropriate initial investigation to characterize the left upper quadrant mass, assess for **lymphadenopathy**, and detect potential **metastatic disease**, guiding further management. *Upper gastrointestinal endoscopy and colonoscopy* - While **iron deficiency anemia** often necessitates **bidirectional endoscopy**, the presence of a **palpable abdominal mass** and significant weight loss makes comprehensive cross-sectional imaging a more urgent and appropriate first step. - Endoscopy primarily evaluates the luminal aspects of the GI tract and would not effectively characterize an **extra-luminal** or **retroperitoneal mass**, which could be responsible for the physical finding. *Bone marrow biopsy* - Although the patient has **anemia** and **reactive thrombocytosis**, these are more likely secondary to the suspected **malignancy** or chronic iron deficiency rather than a primary hematological disorder. - This invasive procedure is not indicated as the initial diagnostic step until common **solid organ malignancies** and gastrointestinal causes have been excluded via imaging. *FBC repeat in 2 weeks with reticulocyte count* - Delaying further investigation by merely repeating blood tests is inappropriate given the presence of **alarming red flag features** like significant unintentional weight loss and a **palpable abdominal mass**. - The current blood test results already confirm significant pathology (microcytic anemia, very low ferritin, thrombocytosis) that mandates immediate and definitive diagnostic workup. *Faecal immunochemical test (FIT)* - **FIT** is primarily a screening tool for **occult faecal blood** and is not appropriate as the initial investigation in a symptomatic patient with a **palpable abdominal mass**, significant weight loss, and established **iron deficiency anemia**. - Clinical guidelines dictate that patients with **red flag features** such as a palpable mass or unexplained iron deficiency anemia require direct visualization or imaging, bypassing less specific screening tests.

Question 57: A 44-year-old woman presents with a 19-week history of widespread pain affecting her neck, back, arms, and legs, associated with profound fatigue and poor sleep quality. Pain scores average 7/10 and are present most days. She has been extensively investigated with normal blood tests, imaging, and rheumatology review which found no evidence of inflammatory arthritis. She is struggling to continue working as a teacher. Which of the following management approaches represents best practice according to current UK guidance?

A. Prescribe regular paracetamol and ibuprofen for pain control
B. Explain diagnosis of fibromyalgia and offer graded exercise programme with amitriptyline (Correct Answer)
C. Refer for cognitive behavioural therapy as primary intervention
D. Arrange trial of oral corticosteroids for possible undiagnosed inflammatory condition
E. Prescribe strong opioids to enable return to work

Explanation: ***Explain diagnosis of fibromyalgia and offer graded exercise programme with amitriptyline*** - The patient's presentation of widespread chronic pain, profound fatigue, and poor sleep quality over 19 weeks, with normal investigations and no evidence of inflammatory arthritis, is highly characteristic of **fibromyalgia**. - Current UK guidance (NICE) for chronic primary pain advocates a **multimodal approach**, including a positive diagnosis, patient education, **graded exercise programs**, and low-dose **amitriptyline** to manage pain and improve sleep. *Prescribe regular paracetamol and ibuprofen for pain control* - **Simple analgesics** like paracetamol and **NSAIDs** like ibuprofen have demonstrated very limited efficacy in managing the widespread, neuropathic-like pain of **fibromyalgia**. - Routine use of these medications is not recommended as primary treatment in chronic primary pain syndromes according to current **NICE guidelines**. *Refer for cognitive behavioural therapy as primary intervention* - While **CBT** is a valuable intervention for chronic pain management, helping with coping strategies and psychological distress, it is typically part of a **multimodal treatment plan** rather than a standalone primary intervention. - Initial management should encompass a broader approach including education, physical activity, and appropriate pharmacotherapy for symptom relief. *Arrange trial of oral corticosteroids for possible undiagnosed inflammatory condition* - This approach is inappropriate as the patient has already undergone extensive investigation, including a **rheumatology review** and blood tests, which found **no evidence of inflammation** or inflammatory arthritis. - Administering **corticosteroids** without an inflammatory diagnosis would expose the patient to unnecessary side effects without addressing the underlying **fibromyalgia** pathology. *Prescribe strong opioids to enable return to work* - **Strong opioids** are explicitly not recommended for the long-term management of **chronic primary pain**, including **fibromyalgia**, due to their high risks of **dependence**, addiction, and lack of sustained efficacy. - Opioids rarely improve functional outcomes or quality of life in chronic non-cancer pain and can lead to worsened pain (opioid-induced hyperalgesia) over time.

Question 58: A 53-year-old woman presents with a 14-week history of fatigue, anorexia, and 6kg weight loss. She mentions feeling generally unwell with vague abdominal discomfort and frequent headaches. She has a history of vitiligo and type 1 diabetes diagnosed in childhood. Blood tests show Na+ 128 mmol/L, K+ 5.4 mmol/L, urea 8.2 mmol/L, creatinine 95 μmol/L, and random glucose 3.8 mmol/L. What is the single most important immediate investigation?

A. Short synacthen test
B. Serum cortisol level
C. CT abdomen and pelvis
D. 9am cortisol and ACTH levels (Correct Answer)
E. Thyroid function tests

Explanation: ***9am cortisol and ACTH levels*** - The patient's symptoms (fatigue, anorexia, weight loss, vague abdominal discomfort, headaches), history of **vitiligo** and **type 1 diabetes** (suggesting **autoimmune polyendocrine syndrome**), and lab findings (**hyponatremia**, **hyperkalemia**, **hypoglycemia**) are highly indicative of **adrenal insufficiency** (Addison's disease). - A **9am cortisol** level is the most appropriate initial screening test due to the **circadian rhythm** of cortisol, providing a reliable baseline, and concurrent **ACTH** helps differentiate primary from secondary adrenal insufficiency. *Short synacthen test* - This test, also known as an **ACTH stimulation test**, is the gold standard for **confirming adrenal insufficiency** but is typically performed *after* an initial screening test (like 9am cortisol) suggests a deficiency. - It assesses the adrenal glands' reserve capacity to produce cortisol in response to exogenous ACTH, but it is not the *immediate* first-line screening investigation. *Serum cortisol level* - A **random serum cortisol** level is often unreliable due to significant **diurnal variation** in cortisol secretion throughout the day. - Without a specific time of day (like 9 am, when cortisol is typically at its peak), a random result can be misleading and lead to misdiagnosis or unnecessary further investigations. *CT abdomen and pelvis* - Imaging studies like **CT of the abdomen and pelvis** are used to investigate the **underlying cause** of adrenal insufficiency (e.g., adrenal hemorrhage, adrenal malignancy, or atrophy) *after* the diagnosis has been biochemically established. - It is not an initial diagnostic test for evaluating adrenal function or the acute metabolic derangements seen in this patient. *Thyroid function tests* - While **autoimmune polyendocrine syndrome** often includes **thyroid dysfunction**, the patient's prominent **hyponatremia**, **hyperkalemia**, and **hypoglycemia** are characteristic of adrenal insufficiency and represent more immediate life-threatening concerns. - Although important to evaluate as part of a comprehensive workup for autoimmune conditions, it is not the **single most important immediate investigation** given the acute electrolyte and glucose abnormalities.

Question 59: A 70-year-old woman presents with a 10-week history of progressive fatigue and generalized weakness. She reports difficulty climbing stairs and rising from a chair. She has noticed a rash on her knuckles and eyelids. Blood tests show Hb 125 g/L, ESR 42 mm/hr, creatine kinase 3,450 U/L, ALT 156 U/L, and positive anti-Jo-1 antibodies. In the context of her undifferentiated presentation, screening for which associated condition is most important?

A. Interstitial lung disease (Correct Answer)
B. Ischaemic heart disease
C. Oesophageal dysmotility
D. Renal impairment
E. Peripheral neuropathy

Explanation: ***Interstitial lung disease*** - The patient's presentation with **proximal muscle weakness**, classic **Gottron's papules** on knuckles, **heliotrope rash** on eyelids, elevated **creatine kinase**, and **positive anti-Jo-1 antibodies** is highly indicative of **dermatomyositis** with **antisynthetase syndrome**. - **Anti-Jo-1 antibodies** are strongly associated with **interstitial lung disease (ILD)**, which can affect 70-80% of patients with antisynthetase syndrome and is a significant cause of mortality, making screening crucial. *Ischaemic heart disease* - While systemic inflammatory conditions can increase overall **cardiovascular risk**, there is no specific or direct strong association between **anti-Jo-1 antibodies** and acute **ischaemic heart disease**. - Cardiac involvement in inflammatory myopathies is more typically **myocarditis** or conduction abnormalities, rather than primary coronary artery disease. *Oesophageal dysmotility* - **Oesophageal dysmotility** and **dysphagia** are common manifestations in inflammatory myopathies due to involvement of pharyngeal and upper esophageal striated muscles, posing a risk for **aspiration**. - Although clinically important, **interstitial lung disease** is a more prevalent and life-threatening systemic complication specifically linked to **anti-Jo-1 antibodies** compared to oesophageal issues, making it the most critical screening target. *Renal impairment* - **Renal involvement** is generally **uncommon** in patients with dermatomyositis or polymyositis. - Severe **rhabdomyolysis** with massive muscle breakdown can rarely lead to **acute kidney injury** due to myoglobinuria, but this is not a primary or direct manifestation of the disease or specifically linked to **anti-Jo-1 antibodies** for routine screening. *Peripheral neuropathy* - **Peripheral neuropathy** is not considered a characteristic feature or direct complication of inflammatory myopathies like dermatomyositis, which primarily target **skeletal muscle fibers**. - The presence of neurological deficits beyond muscle weakness would suggest an alternative or co-existing condition, such as **vasculitis** or a **paraneoplastic syndrome** affecting nerves.

Question 60: A 39-year-old man presents with a 15-week history of fever up to 38.4°C occurring 2-3 times weekly, associated with severe night sweats requiring bed sheet changes, and 9kg weight loss. He reports generalized itching worse after showering. Examination reveals firm, non-tender lymphadenopathy in the cervical and axillary regions, with the largest node measuring 2.5cm. Blood tests show Hb 108 g/L, WCC 11.2 × 10⁹/L with lymphocytosis, ESR 68 mm/hr, and LDH 890 U/L. What is the most appropriate investigation to establish the diagnosis?

A. CT chest, abdomen and pelvis with contrast
B. Bone marrow aspiration and trephine
C. Excisional lymph node biopsy (Correct Answer)
D. Fine needle aspiration of largest lymph node
E. Flow cytometry on peripheral blood

Explanation: ***Excisional lymph node biopsy*** - This is the **gold standard** for diagnosing **lymphoma** because it preserves the **tissue architecture**, which is crucial for accurate subtyping and immunohistochemistry, essential for identifying **Reed-Sternberg cells** in Hodgkin lymphoma. - The patient's presentation with **B-symptoms** (fever, night sweats, weight loss), **aquagenic pruritus**, and **lymphadenopathy** is highly suggestive of lymphoma, necessitating a definitive histological diagnosis. *CT chest, abdomen and pelvis with contrast* - This imaging study is primarily used for **staging** lymphoma according to the Ann Arbor classification, determining the extent of the disease once a diagnosis has already been established. - It cannot provide a **histological diagnosis** or differentiate between various lymphoma subtypes or benign reactive lymphadenopathy. *Bone marrow aspiration and trephine* - This procedure is typically performed to assess for **bone marrow involvement** (part of staging) rather than being the primary diagnostic test for initial diagnosis of peripheral lymphadenopathy. - While it can detect lymphoma cells, it does not provide the comprehensive **lymph node architecture** necessary for the initial diagnosis and subtyping of lymphoma. *Fine needle aspiration of largest lymph node* - **FNA** is often insufficient for diagnosing lymphoma because it yields individual cells and **lacks the intact nodal architecture** crucial for accurate classification and subtyping. - It is more appropriate for confirming **metastatic carcinoma** or infectious etiologies but is generally not the initial diagnostic choice for suspected lymphoma. *Flow cytometry on peripheral blood* - This test is most useful for diagnosing conditions where malignant cells are present in the bloodstream, such as **leukemias** (e.g., CLL) or identifying abnormal lymphocyte populations. - It is generally **not diagnostic for localized lymphomas**, which require a solid tissue biopsy to observe cellular morphology and architectural changes within the lymph node.

Question 61: A 62-year-old man presents with a 12-week history of fatigue, poor appetite, and 8kg weight loss. He has a history of alcohol excess (80 units per week) and chronic hepatitis C infection. Examination reveals cachexia, jaundice, and ascites. Liver function tests show bilirubin 145 μmol/L, ALT 98 U/L, ALP 456 U/L, albumin 28 g/L, and INR 1.8. Alpha-fetoprotein is 890 ng/mL. What is the most appropriate immediate action?

A. Arrange 2-week wait referral to upper GI surgery
B. Request urgent ultrasound abdomen within 2 weeks
C. Refer urgently to hepatology via local cancer pathway
D. Arrange same-day hospital assessment (Correct Answer)
E. Request CT abdomen and pelvis and review results before referral

Explanation: ***Arrange same-day hospital assessment*** - The patient presents with clear signs of **liver decompensation**, including **jaundice**, **ascites**, low **albumin**, and a prolonged **INR (1.8)**. - The elevated **Alpha-fetoprotein (890 ng/mL)** and history of chronic **Hepatitis C** strongly suggest **Hepatocellular Carcinoma (HCC)**, necessitating urgent stabilization and management in a hospital setting. *Arrange 2-week wait referral to upper GI surgery* - This referral pathway is primarily intended for suspected **oesophageal** or **gastric cancers**, not typically for primary liver pathology or acute liver decompensation. - Given the signs of **acute liver failure** or severe decompensation, an outpatient 2-week referral is dangerously delayed for this patient. *Request urgent ultrasound abdomen within 2 weeks* - While an **ultrasound** is crucial for diagnosing HCC, waiting up to two weeks is inappropriate for a patient presenting with **cachexia**, **jaundice**, and **ascites**. - Diagnostic imaging should be performed as part of an **immediate hospital admission** where results can be rapidly acted upon and supportive care provided. *Refer urgently to hepatology via local cancer pathway* - Although urgent **hepatology consultation** is needed for suspected **HCC**, the presence of **acute decompensation** requires emergency admission over an outpatient cancer pathway referral. - A standard cancer pathway referral does not provide the immediate medical stabilization and management required for significant **synthetic liver dysfunction**. *Request CT abdomen and pelvis and review results before referral* - Delaying clinical action to await **CT scan** results in primary care is inappropriate when the patient displays significant **jaundice**, **ascites**, and **cachexia**. - The priority is **immediate stabilization** and a comprehensive diagnostic workup in a secondary care setting due to the high risk of rapid deterioration.

Question 62: A 48-year-old woman presents with a 7-week history of right upper quadrant pain. She describes the pain as constant, dull in nature, and rates it 4/10 in severity. It is not related to eating and is not relieved by simple analgesia. She has lost 3kg in weight and feels generally fatigued. Examination reveals mild hepatomegaly with a smooth, non-tender liver edge 2cm below the costal margin. What additional pain characteristic would be most concerning and warrant urgent investigation?

A. Pain radiating to the right shoulder tip
B. Pain worse on deep inspiration
C. Progressive increase in pain severity over recent weeks (Correct Answer)
D. Pain associated with nausea
E. Pain disturbing sleep at night

Explanation: ***Progressive increase in pain severity over recent weeks*** - The patient's presentation with persistent RUQ pain, unexplained **weight loss**, fatigue, and hepatomegaly raises suspicion for **malignancy**. A **progressive increase in pain severity** is a cardinal red flag for an active and worsening pathological process, such as **hepatocellular carcinoma** or **metastatic liver disease**. - This symptom, when combined with systemic indicators like weight loss and hepatomegaly, necessitates **urgent and comprehensive investigation** to rule out rapidly progressing severe conditions. *Pain radiating to the right shoulder tip* - **Right shoulder tip pain** is typically referred pain caused by irritation of the **diaphragm** (via the phrenic nerve), often seen in conditions like **biliary colic**, cholecystitis, or subphrenic abscess. - While indicating pathology, it is a localized symptom of diaphragmatic irritation and does not inherently suggest a **progressively worsening systemic disease** as strongly as increasing pain severity. *Pain worse on deep inspiration* - Pain exacerbated by deep inspiration, or **pleuritic pain**, suggests involvement of the **parietal peritoneum** or the **Glisson's capsule** (fibrous capsule surrounding the liver), common in conditions like **liver inflammation**, abscess, or pleurisy. - This symptom, while indicative of local inflammation, does not carry the same urgent implication for a rapidly advancing, potentially malignant process as a *progressive increase in pain severity* in the context of systemic symptoms. *Pain associated with nausea* - **Nausea** is a common and highly **non-specific symptom** that can accompany a vast array of gastrointestinal and systemic conditions, ranging from benign to severe. - Its presence alone, without more specific accompanying features, does not elevate the level of concern for **urgent malignancy investigation** as significantly as a progressively worsening pain pattern coupled with weight loss and hepatomegaly. *Pain disturbing sleep at night* - **Nocturnal pain** is generally considered a **red flag** for **organic pathology** as opposed to functional pain, and it can be present in both benign and malignant conditions. - However, a **progressive increase in pain severity** over time, especially when combined with systemic symptoms like unexplained weight loss and fatigue, provides a more direct and urgent indicator of an active, worsening, and potentially life-threatening process than pain disturbing sleep alone.

Question 63: A 56-year-old man presents with an 11-week history of daily fever peaking at 38.6°C, occurring mainly in the evenings. He reports 5kg weight loss, night sweats, and vague abdominal discomfort. He has a history of prosthetic aortic valve replacement 18 months ago. Examination reveals a soft early diastolic murmur and mild splenomegaly. Three sets of blood cultures taken in the practice are negative after 5 days. What is the most appropriate next step?

A. Refer for transoesophageal echocardiography and specialist blood cultures (Correct Answer)
B. Reassure that negative blood cultures exclude endocarditis
C. Start empirical antibiotics for culture-negative endocarditis
D. Request abdominal CT to investigate splenomegaly
E. Arrange urgent cardiology outpatient review within 2 weeks

Explanation: ***Refer for transoesophageal echocardiography and specialist blood cultures*** - The patient presents with compelling evidence for **infective endocarditis (IE)**, including a **prosthetic aortic valve**, persistent fever, weight loss, and a new **diastolic murmur**. - **Transoesophageal echocardiography (TOE)** is essential for diagnosing prosthetic valve IE, as it provides superior visualization of **vegetations** and perivalvular complications compared to transthoracic echocardiography, while **specialist blood cultures** are crucial for identifying fastidious organisms in suspected **culture-negative endocarditis**. *Reassure that negative blood cultures exclude endocarditis* - **Negative blood cultures** after 5 days do not exclude IE, especially in a patient with a **prosthetic valve** and classic symptoms, as up to 10% of cases are **culture-negative** due to fastidious organisms or prior antibiotic use. - Dismissing the diagnosis based solely on negative standard cultures in this context would be a dangerous oversight, potentially leading to severe complications. *Start empirical antibiotics for culture-negative endocarditis* - Initiating **empirical antibiotics** before performing more sensitive investigations like **TOE** and **specialist blood cultures** can complicate diagnosis by potentially sterilizing the cultures and making identification of the causative organism difficult. - A more precise diagnosis is critical for guiding targeted therapy and improving outcomes, especially in a subacute presentation where there is time for further investigation. *Request abdominal CT to investigate splenomegaly* - While **splenomegaly** is a recognized sign in IE, reflecting chronic immune stimulation or embolization, it is a secondary manifestation. - Prioritizing an abdominal CT over investigating the primary cardiac pathology (IE) would significantly delay the diagnosis and management of a life-threatening condition at its source. *Arrange urgent cardiology outpatient review within 2 weeks* - Suspected **infective endocarditis** in a patient with a prosthetic valve and systemic symptoms constitutes a **medical emergency** requiring immediate hospital admission for urgent evaluation and treatment. - A two-week delay for an outpatient review is unacceptable and places the patient at high risk for severe complications such as **acute heart failure**, **systemic embolization**, or **myocardial abscess**.

Question 64: A 41-year-old woman presents with a 16-week history of profound fatigue, low-grade intermittent fever up to 37.8°C, and generalised myalgia. She reports difficulty concentrating at work and unrefreshing sleep. Her symptoms began following a flu-like illness. Examination is unremarkable. Extensive investigations including FBC, inflammatory markers, TFTs, coeliac serology, and viral screening are all normal. She is becoming increasingly frustrated with lack of diagnosis. What is the most appropriate approach to her ongoing management?

A. Reassure that all tests are normal and discharge from follow-up
B. Arrange CT chest, abdomen and pelvis to exclude occult malignancy
C. Discuss diagnosis of chronic fatigue syndrome and establish supportive management plan (Correct Answer)
D. Refer to infectious diseases for further investigation
E. Prescribe empirical corticosteroids for possible inflammatory condition

Explanation: ***Discuss diagnosis of chronic fatigue syndrome and establish supportive management plan*** - This patient meets the criteria for **Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)**, specifically persistent fatigue for over **4 months (16 weeks)**, cognitive dysfunction, and unrefreshing sleep following a viral trigger. - Following the exclusion of other pathologies (normal FBC, inflammatory markers, and TFTs), **NICE guidelines** recommend confirming the diagnosis and initiating a management plan focused on **energy management (pacing)** and symptom support. *Reassure that all tests are normal and discharge from follow-up* - Dismissing the patient after normal tests can damage the **therapeutic relationship** and ignores the very real, debilitating nature of ME/CFS symptoms. - Discharge without a management plan is inappropriate as it fails to provide the **support and education** needed to improve the patient's quality of life. *Arrange CT chest, abdomen and pelvis to exclude occult malignancy* - Extensive imaging is not indicated in the absence of **red-flag symptoms** like significant weight loss, night sweats, or localized physical findings. - Over-investigation can increase **patient anxiety** and exposure to unnecessary radiation without a clear clinical suspicion of malignancy. *Refer to infectious diseases for further investigation* - The patient has already had common **viral screening** and inflammatory markers performed, which were normal, making a chronic active infection unlikely. - Routine referral to **Infectious Diseases** is not standard management for suspected ME/CFS unless there are specific clinical markers of an atypical infection. *Prescribe empirical corticosteroids for possible inflammatory condition* - **Empirical corticosteroids** are not recommended in ME/CFS management and can cause significant side effects like weight gain, osteoporosis, and immunosuppression. - The patient's **inflammatory markers** (CRP/ESR) were normal, making an underlying systemic inflammatory or vasculitic condition highly improbable.

Question 65: A 67-year-old man with COPD presents with a 13-week history of progressive fatigue and unintentional 6kg weight loss. He reports worsening breathlessness but attributes this to his lung disease. He continues to smoke 15 cigarettes daily. Examination reveals reduced breath sounds in the right upper zone and subtle finger clubbing that he states is new. Oxygen saturations are 93% on air. What is the most appropriate next step?

A. Arrange pulmonary rehabilitation referral
B. Request chest X-ray within 2 weeks
C. Increase inhaled corticosteroid dose
D. Request urgent CT chest within 2 weeks (Correct Answer)
E. Arrange spirometry and COPD review

Explanation: ***Request urgent CT chest within 2 weeks***- This patient presents with multiple "red flags" for **lung cancer**, including **unintentional weight loss**, focal examination findings (reduced breath sounds in the right upper zone), and **new-onset finger clubbing** in a smoker with COPD.- According to **NICE guidelines (NG12)** for suspected cancer, these combined features mandate an **urgent CT chest** (within 2 weeks) due to the high probability of malignancy, rather than less sensitive investigations.*Arrange pulmonary rehabilitation referral*- **Pulmonary rehabilitation** aims to improve physical and psychological condition in patients with chronic respiratory disease, but it does not address acute, suspicious symptoms.- Referral for rehabilitation would inappropriately **delay the investigation** of potentially serious underlying pathology like **lung cancer**, which requires urgent diagnostic imaging.*Request chest X-ray within 2 weeks*- While a chest X-ray can be an initial screening tool, its sensitivity for detecting **lung cancer**, especially in early stages or specific locations, is **limited** compared to CT.- Given the strong clinical suspicion (new clubbing, significant weight loss, focal signs), proceeding directly to a **CT scan** is more appropriate to avoid false negatives and expedite diagnosis.*Increase inhaled corticosteroid dose*- Increasing **inhaled corticosteroid dose** is a management strategy for controlling symptoms of **COPD** or treating exacerbations.- It is not an investigative step for new, systemic symptoms and **red flags** such as **unexplained weight loss** and **finger clubbing** that suggest a separate, potentially life-threatening diagnosis.*Arrange spirometry and COPD review*- **Spirometry** is used to diagnose and monitor **COPD severity**, and a COPD review focuses on disease management.- These actions would not identify or investigate a potential **malignancy**, especially given the new, concerning symptoms that extend beyond typical COPD progression.

Question 66: A 34-year-old woman presents with a 9-week history of intermittent fever up to 38.5°C, profound fatigue, and arthralgia affecting multiple joints. She has recently returned from a 6-month period working in rural India. Examination reveals a macular rash on her trunk and mild lymphadenopathy. Blood tests show Hb 102 g/L, WCC 3.1 × 10⁹/L (lymphopenia), platelets 145 × 10⁹/L, ALT 89 U/L, and positive ANA at 1:640 titre. What is the most appropriate next step in management?

A. Arrange urgent rheumatology referral for suspected systemic lupus erythematosus
B. Test for dengue and chikungunya serology (Correct Answer)
C. Request anti-dsDNA and complement levels
D. Start empirical hydroxychloroquine therapy
E. Arrange bone marrow biopsy

Explanation: ***Test for dengue and chikungunya serology***- Recent travel to **India** combined with **fever**, **arthralgia**, and a **macular rash** necessitates excluding endemic tropical infections like **Dengue** and **Chikungunya**.- Viral infections can commonly trigger a **false-positive ANA** and cause hematological abnormalities like **lymphopenia** and **thrombocytopenia**, mimicking systemic autoimmune diseases.*Arrange urgent rheumatology referral for suspected systemic lupus erythematosus*- While the symptoms fulfill some **SLICC/ACR criteria**, an urgent referral is premature before excluding an **infectious mimic** in the context of recent travel.- Tropical infections can present with the same **constitutional symptoms** and joint involvement as a lupus flare.*Request anti-dsDNA and complement levels*- Although these tests help confirm **SLE**, they should be performed in parallel with, not instead of, screening for **infectious etiologies** in a returning traveler.- **Low complement** and **autoantibodies** can occasionally be transiently altered during the acute and subacute phases of certain viral infections.*Start empirical hydroxychloroquine therapy*- Empiric treatment for an autoimmune condition is contraindicated until a **definitive diagnosis** is made and infection is ruled out.- **Hydroxychloroquine** would not address the underlying viral pathology and could complicate the clinical picture by introducing **side effects**.*Arrange bone marrow biopsy*- **Pancytopenia** or mild cytopenias in the presence of fever and travel are more likely due to **peripheral destruction** or **viral suppression** rather than primary bone marrow failure.- This is an **invasive procedure** and is not indicated as a first-line investigation for a patient with this travel history and high ANA titre.

Question 67: According to current UK primary care guidance, which of the following criteria defines medically significant unintentional weight loss requiring systematic investigation?

A. Loss of 3% of body weight over 3 months
B. Loss of 5% of body weight over 6-12 months (Correct Answer)
C. Loss of 7% of body weight over 12 months
D. Loss of 10% of body weight at any time point
E. Any documented weight loss with associated symptoms

Explanation: ***Loss of 5% of body weight over 6-12 months*** - According to current UK primary care guidance, specifically NICE guidelines, **medically significant unintentional weight loss** is defined as a reduction of **5% or more** of total body weight over a period of **6-12 months**. - This criterion acts as a key trigger for initiating a **systematic investigation** to identify potential underlying serious conditions, such as **malignancy**, chronic inflammatory diseases, or endocrine disorders. *Loss of 3% of body weight over 3 months* - A **3% weight loss** over a relatively short period like 3 months is often considered within the range of **normal physiological variation** or may be attributed to minor, self-limiting illnesses. - This value is typically not sufficient on its own to warrant an extensive and potentially invasive **diagnostic workup** without additional concerning symptoms or red flags. *Loss of 7% of body weight over 12 months* - While a **7% weight loss** over 12 months is certainly concerning and would necessitate investigation, it exceeds the **minimum threshold** established by UK primary care guidance for initiating investigations. - Waiting for a 7% loss might delay diagnosis of significant conditions that could have been identified earlier if the 5% over 6-12 months criterion were applied. *Loss of 10% of body weight at any time point* - A **10% weight loss** is a substantial and highly concerning finding that always requires immediate investigation, regardless of the timeframe. - However, this is not the **defining minimum criterion** for initiating a systematic investigation in primary care; the 5% threshold is designed for earlier detection. *Any documented weight loss with associated symptoms* - While **associated symptoms** are crucial and always prompt clinical assessment and potential investigation, the question specifically asks for the **definitive weight loss criterion**. - Relying solely on 'any documented weight loss' without a quantitative threshold could lead to over-investigation of minor, non-significant weight fluctuations.

Question 68: A 52-year-old woman presents with a 14-week history of fatigue, poor appetite, and 7kg weight loss. She also reports several months of bilateral hand stiffness worse in the mornings lasting over 2 hours, and difficulty gripping objects. Examination reveals synovitis of the metacarpophalangeal joints bilaterally and wrist swelling. What is the single most appropriate initial blood test to guide urgent referral?

A. Rheumatoid factor and anti-CCP antibodies (Correct Answer)
B. Full blood count and ESR
C. Thyroid function tests
D. Antinuclear antibody
E. HLA-B27

Explanation: ***Rheumatoid factor and anti-CCP antibodies*** - The clinical presentation with **bilateral hand stiffness** worse in the mornings for **over 2 hours**, difficulty gripping, and **synovitis of metacarpophalangeal joints** and wrists is highly suggestive of **Rheumatoid Arthritis (RA)**. - **Rheumatoid factor** and **anti-CCP antibodies** are specific diagnostic markers for RA and are crucial for confirming the diagnosis and initiating an **urgent referral** to a rheumatologist, as early intervention can prevent joint damage. *Full blood count and ESR* - While **ESR** (Erythrocyte Sedimentation Rate) may be elevated in inflammatory conditions like RA, and **FBC** (Full Blood Count) might show **anaemia of chronic disease**, these are non-specific markers of systemic inflammation. - These tests are indicative of inflammation but do not provide specific diagnostic information to differentiate RA from other conditions, nor do they meet the criteria for an **urgent referral pathway** for RA. *Thyroid function tests* - **Thyroid dysfunction** can cause fatigue and weight changes, and hypothyroidism can lead to muscle aches and joint pain, but it does not typically present with the characteristic **symmetrical synovitis** of the MCPs and prolonged morning stiffness seen here. - These tests would not explain the prominent **inflammatory arthritis** features and therefore are not the most appropriate initial test for guiding an urgent rheumatology referral based on these specific joint symptoms. *Antinuclear antibody* - **Antinuclear antibody (ANA)** is a primary screening test for **Systemic Lupus Erythematosus (SLE)** and other systemic autoimmune diseases, which can present with arthralgia or arthritis. - However, the patient's presentation with prominent **symmetrical synovitis** of small joints and prolonged morning stiffness is far more classic for **Rheumatoid Arthritis** than SLE, making RA-specific markers more appropriate for an *initial urgent referral*. *HLA-B27* - **HLA-B27** is a genetic marker strongly associated with **seronegative spondyloarthropathies**, such as **ankylosing spondylitis** and **reactive arthritis**. - These conditions typically involve **axial skeleton** (spine, sacroiliac joints) or **asymmetric peripheral large joints**, and often lack the symmetrical small joint synovitis characteristic of rheumatoid arthritis, making it an inappropriate initial test in this context.

Question 69: A 45-year-old man presents with a 10-week history of persistent fatigue and a 4kg weight loss. He works as a sewage worker and reports recent travel to Egypt. He describes episodic sweating and mild abdominal discomfort. Examination reveals hepatomegaly 3cm below the costal margin and mild splenomegaly. His temperature is 37.6°C. Blood tests show Hb 108 g/L, WCC 3.2 × 10⁹/L, platelets 110 × 10⁹/L, and eosinophils 0.8 × 10⁹/L. What is the most likely diagnosis?

A. Visceral leishmaniasis
B. Chronic schistosomiasis (Correct Answer)
C. Brucellosis
D. Q fever endocarditis
E. Leptospirosis

Explanation: ***Chronic schistosomiasis*** - This patient's **travel history to Egypt** and exposure to contaminated water (sewage work) are classic for **Schistosoma mansoni** infection, which leads to periportal fibrosis and **portal hypertension**. - The clinical triad of **hepatosplenomegaly**, **pancytopenia** (due to hypersplenism), and **eosinophilia** is highly characteristic of a chronic helminthic infection. *Visceral leishmaniasis* - While it causes significant **pancytopenia** and massive splenomegaly, it is typically associated with **eosinopenia** rather than eosinophilia. - The fever in leishmaniasis is usually more severe and persistent compared to the mild elevation seen in this case. *Brucellosis* - Presentation often includes an **undulant fever**, arthralgia, and exposure to **unpasteurized dairy** or livestock, which does not fit the sewage worker's profile. - It commonly causes **leukopenia** and relative lymphocytosis but is not typically associated with **eosinophilia**. *Q fever endocarditis* - Usually presents with features of **culture-negative endocarditis** and is associated with exposure to farm animals (sheep, goats). - **Hepatosplenomegaly** can occur, but it would not explain the **peripheral eosinophilia** and 10-week history focused on abdominal discomfort. *Leptospirosis* - Typically presents as an **acute febrile illness** (Weil's disease) often following contact with water contaminated by rat urine, featuring **conjunctival suffusion** and jaundice. - It is not a chronic condition lasting 10 weeks and does not specifically lead to the **portal hypertension** syndrome seen here.

Question 70: A 58-year-old woman presents with a 3-month history of progressive fatigue and unintentional 5kg weight loss. She reports intermittent low-grade fever and has noticed her rings are tighter. Blood tests show Hb 118 g/L, MCV 88 fL, ESR 72 mm/hr, and normal renal and liver function. She takes no regular medications and has no significant past medical history. Examination reveals bilateral ankle oedema and elevated jugular venous pressure. What is the most appropriate initial investigation?

A. CT chest, abdomen and pelvis
B. Echocardiography (Correct Answer)
C. Serum and urine protein electrophoresis
D. Bone marrow biopsy
E. Anti-nuclear antibody screen

Explanation: ***Echocardiography*** - The presence of **elevated JVP** and **bilateral ankle oedema** are key signs of **right-sided heart failure** or **systemic fluid overload**, making cardiac assessment paramount. - Given the systemic symptoms like **fatigue**, **weight loss**, **fever**, and a very high **ESR**, echocardiography is crucial to evaluate for conditions such as **atrial myxoma**, **restrictive cardiomyopathy** (e.g., amyloidosis), or even **infective endocarditis** affecting cardiac function. *CT chest, abdomen and pelvis* - While useful for screening occult **malignancy** (which can cause constitutional symptoms and high ESR), it is not the most direct initial investigation when overt signs of **cardiac decompensation** are present. - A CT scan would not provide detailed **functional or structural information** about the heart valves, chambers, or pericardium, which is critical for the patient's immediate clinical signs. *Serum and urine protein electrophoresis* - These tests are used to diagnose **monoclonal gammopathies** such as **multiple myeloma** or **amyloidosis**, which can cause systemic symptoms and **restrictive cardiomyopathy**. - However, given the immediate clinical signs of **heart failure**, direct cardiac imaging (echocardiography) is a higher-yield initial step to confirm cardiac involvement before further workup for aetiology. *Bone marrow biopsy* - This invasive procedure is primarily used to diagnose **haematological malignancies** or other bone marrow disorders, often in the presence of unexplained cytopenias or specific bone pain. - While systemic symptoms and anaemia are present, the overt signs of **cardiac failure** dictate that a cardiac evaluation should precede an invasive bone marrow assessment. *Anti-nuclear antibody screen* - An **ANA screen** investigates **autoimmune conditions** like **systemic lupus erythematosus (SLE)** or other connective tissue diseases, which can cause elevated **ESR** and constitutional symptoms. - Though these conditions can affect the heart, the prominent **congestive heart failure** signs necessitate a direct cardiac imaging study like **echocardiography** as the most urgent initial investigation to understand the extent of cardiac dysfunction.

Question 71: A 73-year-old man presents with a 13-week history of progressive fatigue, 9kg unintentional weight loss, and intermittent fevers. He reports early satiety and a sensation of abdominal fullness. Examination reveals massive splenomegaly extending to the right iliac fossa. Blood tests show Hb 82 g/L, WCC 85 × 10⁹/L with neutrophils 55 × 10⁹/L, metamyelocytes 8 × 10⁹/L, myelocytes 6 × 10⁹/L, basophils 4 × 10⁹/L, platelets 580 × 10⁹/L. Blood film shows left shift with full spectrum of myeloid cells and increased basophils. Which molecular investigation would most specifically confirm the diagnosis and have the most significant prognostic and therapeutic implications?

A. BCR-ABL1 fusion gene detection by PCR or FISH (Correct Answer)
B. JAK2 V617F mutation analysis
C. Bone marrow cytogenetics for Philadelphia chromosome
D. Flow cytometry for CD markers
E. Serum vitamin B12 and folate levels

Explanation: ***BCR-ABL1 fusion gene detection by PCR or FISH*** - The clinical picture of massive splenomegaly, marked leukocytosis with a left shift (including myelocytes, metamyelocytes, and basophils), and thrombocytosis is highly characteristic of **Chronic Myeloid Leukaemia (CML)**. - Detection of the **BCR-ABL1 fusion gene** is the definitive diagnostic test for CML and is critical as it is the target for **Tyrosine Kinase Inhibitors (TKIs)**, which are the mainstay of therapy, and allows for sensitive **quantitative PCR** monitoring of treatment response. *JAK2 V617F mutation analysis* - The **JAK2 V617F mutation** is primarily associated with other **myeloproliferative neoplasms** like Polycythaemia Vera, Essential Thrombocythaemia, and Primary Myelofibrosis. - This mutation is generally absent in classic CML and would not guide the specific targeted therapy (TKIs) used for **BCR-ABL1 positive** disease. *Bone marrow cytogenetics for Philadelphia chromosome* - While the **Philadelphia chromosome (t(9;22))** is characteristic of CML, conventional cytogenetics can be less sensitive than molecular methods (PCR or FISH) for detecting the **BCR-ABL1 fusion gene**. - It may miss **cryptic translocations** where the fusion gene is present without a visible chromosomal abnormality, and it does not provide quantitative data for monitoring treatment response. *Flow cytometry for CD markers* - **Flow cytometry** is mainly used to distinguish between different cell lineages and maturity stages in conditions like **acute leukemias** or lymphomas. - In CML, the diagnosis is defined by the underlying **genetic abnormality (BCR-ABL1)**, and while myeloid markers would be present, they are not specific enough to confirm CML or guide its targeted treatment. *Serum vitamin B12 and folate levels* - Elevated **serum vitamin B12 levels** can be seen in CML due to increased **transcobalamin I** production by the proliferating granulocytes, but this is a non-specific finding. - These tests are primarily used to investigate nutritional deficiencies or megaloblastic anemias and do not provide definitive diagnostic or **prognostic information** for CML.

Question 72: Which of the following statements best describes the recommended approach to pain assessment in patients presenting with chronic pain in primary care according to current UK guidelines?

A. Pain assessment should include biopsychosocial evaluation using tools that address physical, psychological, and social factors affecting pain experience (Correct Answer)
B. Pain intensity measurement using numerical rating scales is sufficient for comprehensive pain assessment
C. Detailed physical examination identifying pain location and character is the primary focus of initial assessment
D. Screening for red flag symptoms should be the sole priority to exclude serious pathology
E. Assessment should focus on determining the underlying pathology before considering pain management strategies

Explanation: ***Pain assessment should include biopsychosocial evaluation using tools that address physical, psychological, and social factors affecting pain experience*** - Current **NICE guidelines** emphasize a **biopsychosocial model**, acknowledging that chronic pain is influenced by biological, psychological (mood, catastrophizing), and social (work, relationships) factors. - Comprehensive assessment requires evaluating the **impact on function** and quality of life rather than focusing solely on physical sensations. *Pain intensity measurement using numerical rating scales is sufficient for comprehensive pain assessment* - While **Numerical Rating Scales (NRS)** are helpful for tracking changes, they are **inherently subjective** and fail to capture the multidimensional nature of chronic pain. - Relying only on intensity scores ignores **psychological distress** and functional impairment, which are critical for management planning. *Detailed physical examination identifying pain location and character is the primary focus of initial assessment* - Although physical examination is necessary to identify **structural pathology**, it often correlates poorly with the actual level of **disability** in chronic pain syndromes. - A purely **biomedical focus** on anatomy neglects the emotional and cognitive factors that sustain chronic pain states. *Screening for red flag symptoms should be the sole priority to exclude serious pathology* - **Red flag screening** is an essential safety step to rule out malignancy or infection, but it is a **preliminary screening** rather than a comprehensive assessment. - Focusing only on serious pathology leaves the **non-specific mechanisms** of chronic pain unaddressed, leading to inadequate patient support. *Assessment should focus on determining the underlying pathology before considering pain management strategies* - In many chronic pain cases (e.g., **chronic primary pain**), a clear underlying cause cannot be found, and management should not be delayed while searching for elusive pathology. - Management strategies like **CBT** or physical therapy can and should be initiated based on the **biopsychosocial profile** regardless of a definitive pathological diagnosis.

Question 73: A 37-year-old woman who works as a veterinary surgeon presents with a 6-week history of fever up to 38.8°C, profound fatigue, night sweats, and generalized arthralgia. She reports the symptoms began gradually about 3 weeks after assisting with difficult calving on a farm. Examination reveals mild hepatomegaly and tenderness over the sacroiliac joints. Blood tests show Hb 118 g/L, WCC 4.1 × 10⁹/L, platelets 165 × 10⁹/L, ALT 95 U/L, ALP 145 U/L, and blood cultures are negative. What is the most appropriate diagnostic test?

A. Brucella serology (IgM and IgG antibodies) (Correct Answer)
B. Q fever serology (phase I and II antibodies)
C. Leptospira serology and PCR
D. Blood cultures in specialized media
E. Bone marrow culture

Explanation: ***Brucella serology (IgM and IgG antibodies)*** - The patient's profession as a **veterinary surgeon** and recent **exposure to calving** are significant risk factors for **brucellosis**, which commonly presents with chronic fever, fatigue, night sweats, generalized arthralgia, and focal **sacroiliitis**. - **Serology** (detecting IgM for acute infection and IgG for chronic or past exposure) is the most appropriate initial diagnostic test due to its non-invasiveness and ability to detect antibodies, as Brucella can be difficult to culture. *Q fever serology (phase I and II antibodies)* - While **Coxiella burnetii** (Q fever) can also be transmitted from animals during parturition, its typical presentations include **pneumonia**, **hepatitis**, or an acute flu-like illness, rather than the prominent prolonged arthralgia and sacroiliitis seen here. - The clinical picture of undulating fever and specific joint tenderness is less characteristic of Q fever and points more strongly towards brucellosis. *Leptospira serology and PCR* - **Leptospirosis** often presents with a more acute febrile illness, severe headache, myalgia, and sometimes **conjunctival suffusion** or complications like **Weil's disease**. - Transmission typically involves contact with water or soil contaminated by **infected animal urine**, which differs from the direct contact during calving indicated in this case. *Blood cultures in specialized media* - Although Brucella species can be cultured, they are **fastidious organisms** that require specialized media and **prolonged incubation** (up to 4 weeks), making them less efficient for initial rapid diagnosis. - Routine blood cultures are often negative, and specific warnings regarding potential **laboratory-acquired infection** are necessary, making serology a safer and faster first-line approach. *Bone marrow culture* - **Bone marrow culture** is highly sensitive for brucellosis and considered the **gold standard** for definitive diagnosis but is an **invasive procedure**. - It is not the most appropriate **initial** diagnostic test and is generally reserved for cases where non-invasive serology is inconclusive or for complicated disease presentations.

Question 74: A 65-year-old woman with metastatic colorectal cancer presents for pain review. She is currently taking regular modified-release morphine 60mg BD with 10mg immediate-release morphine for breakthrough pain, which she uses 4-5 times daily. She describes her pain as 7/10 despite this regimen. She is now experiencing significant nausea and constipation. According to current palliative care guidance for opioid rotation, what would be the most appropriate equivalent total daily dose if switching to subcutaneous diamorphine via syringe driver?

A. 40mg over 24 hours (Correct Answer)
B. 60mg over 24 hours
C. 80mg over 24 hours
D. 120mg over 24 hours
E. 180mg over 24 hours

Explanation: ***40mg over 24 hours***- The patient’s total daily oral morphine dose is **170mg** (60mg BD MR + five 10mg PRN doses); using a standard **3:1 conversion ratio** (oral morphine to subcutaneous diamorphine), the equivalent subcutaneous diamorphine dose is approximately **56.6mg**.- When rotating opioids due to side effects like **nausea and constipation**, a dose reduction of **25-33%** is recommended to account for **incomplete cross-tolerance**, making 40mg the safest and most appropriate choice.*60mg over 24 hours*- This dose represents a direct **3:1 conversion** from the oral morphine equivalent without incorporating a safety reduction for opioid rotation.- Prescribing this full converted amount increases the risk of **opioid toxicity** (e.g., increased sedation, nausea) in a patient switching medications due to existing adverse effects.*80mg over 24 hours*- This dose significantly exceeds the calculated equivalent after a 3:1 conversion and would lead to an unnecessarily high opioid load.- It incorrectly implies a conversion ratio closer to **2:1** or less, which is not standard practice for transitioning from oral morphine to subcutaneous diamorphine.*120mg over 24 hours*- This dose incorrectly mirrors the patient's **modified-release oral morphine dose** and fails to account for the increased potency of parenteral diamorphine.- Using a **1:1 ratio** between oral morphine and subcutaneous diamorphine is clinically unsafe and could lead to **severe opioid overdose**.*180mg over 24 hours*- This is an excessively high dose that represents an **increase** over the total current morphine regimen rather than an equivalent conversion.- Initiating a **syringe driver** at this level would likely cause acute and potentially fatal **opioid overdose** in this patient.

Question 75: A 29-year-old woman presents with an 8-week history of generalized pain affecting her neck, shoulders, lower back, and thighs. She describes the pain as constant, aching, and rated 7/10 in severity. She also reports profound fatigue, non-restorative sleep, difficulty concentrating, and occasional headaches. Examination reveals multiple tender points, but no joint swelling, muscle weakness, or neurological abnormality. Blood tests including FBC, ESR, CRP, TFTs, and CK are all normal. Using recognized clinical criteria, which feature would be most important in establishing the diagnosis?

A. Widespread Pain Index (WPI) score combined with Symptom Severity Scale (SSS) score (Correct Answer)
B. Presence of at least 11 out of 18 specific tender points on digital palpation
C. Duration of symptoms exceeding 6 weeks
D. Absence of inflammatory markers
E. Presence of associated sleep disturbance

Explanation: ***Widespread Pain Index (WPI) score combined with Symptom Severity Scale (SSS) score*** - The **2016 American College of Rheumatology (ACR) criteria** for **fibromyalgia** utilize the WPI and SSS to provide a standardized, reproducible measure of pain distribution and symptom severity. - This approach quantifies **widespread pain** (across 5 regions) and evaluates associated features like **fatigue**, **sleep quality**, and **cognitive symptoms** (fibro-fog). *Presence of at least 11 out of 18 specific tender points on digital palpation* - This was the requirement for the **1990 ACR criteria**, but it is now considered **outdated** because it is highly **subjective** and poorly reproducible in clinical practice. - Modern diagnostic standards have moved away from physical **tender point** examinations in favor of **patient-reported symptom scales**. *Duration of symptoms exceeding 6 weeks* - While chronic pain is central to the diagnosis, the recognized clinical criteria specifically require symptoms to be present for at least **3 months**. - A **6-week duration** is insufficient to meet the formal diagnostic threshold for fibromyalgia and could represent a transient post-viral or inflammatory condition. *Absence of inflammatory markers* - While **normal inflammatory markers** (ESR, CRP) and other normal blood tests help rule out other conditions like **rheumatoid arthritis** or **polymyalgia rheumatica**, they are not diagnostic of fibromyalgia itself. - Fibromyalgia is a diagnosis of **inclusion based on specific clinical symptoms**, not merely a diagnosis of exclusion based on negative laboratory tests. *Presence of associated sleep disturbance* - **Non-restorative sleep** is a classic feature and is scored within the **Symptom Severity Scale (SSS)**, reflecting a core aspect of fibromyalgia pathology. - However, sleep disturbance occurs in many other conditions (e.g., **sleep apnea**, **depression**); therefore, it must be combined with the **Widespread Pain Index** and other SSS elements to establish a fibromyalgia diagnosis.

Question 76: A 54-year-old woman presents with a 16-week history of fatigue, generalised weakness, and 5kg weight loss. She reports craving salty foods and feeling dizzy on standing. On examination, her blood pressure is 95/65 mmHg lying and 78/50 mmHg standing. She has hyperpigmentation noted on her palmar creases and buccal mucosa. Blood tests show Na+ 128 mmol/L, K+ 5.8 mmol/L, glucose 3.8 mmol/L, and urea 8.2 mmol/L. What is the most appropriate next investigation?

A. 9 am serum cortisol and ACTH levels (Correct Answer)
B. Short Synacthen test
C. 24-hour urinary free cortisol
D. Dexamethasone suppression test
E. MRI pituitary

Explanation: ***9 am serum cortisol and ACTH levels*** - Measurement of **9 am serum cortisol** and **ACTH** is the most appropriate initial investigation for suspected **primary adrenal insufficiency (Addison's disease)** given the classic symptoms. - A low serum cortisol coupled with an **elevated ACTH** level confirms primary adrenal insufficiency and explains the **hyperpigmentation** observed due to increased melanocyte-stimulating hormone activity. *Short Synacthen test* - This test is the **gold standard** for confirming adrenal insufficiency, but it is typically performed as a confirmatory test after initial screening with baseline cortisol and ACTH, especially if the baseline cortisol is equivocal. - While definitive, the patient's strong clinical picture and electrolyte derangements warrant the simpler, non-stimulatory baseline measurements first. *24-hour urinary free cortisol* - This investigation is primarily used to screen for **Cushing's syndrome** (hypercortisolism), which presents with symptoms opposite to those of this patient. - It is not suitable for diagnosing adrenal insufficiency as urinary cortisol levels would be low and often indistinguishable from the normal reference range, lacking diagnostic sensitivity. *Dexamethasone suppression test* - The dexamethasone suppression test is used to diagnose **Cushing's syndrome** by evaluating the pituitary-adrenal axis's response to exogenous glucocorticoids. - It has no role in the diagnosis of **adrenal insufficiency** where the primary concern is insufficient cortisol production. *MRI pituitary* - MRI of the pituitary gland is indicated for suspected **secondary adrenal insufficiency** (pituitary or hypothalamic pathology), where ACTH production is deficient. - However, this patient's **hyperpigmentation** is a hallmark of **primary adrenal insufficiency** due to compensatory ACTH excess, making pituitary imaging inappropriate as a first-line investigation.

Question 77: A 61-year-old man with a 15-year history of poorly controlled type 2 diabetes presents with an 11-week history of fatigue and unintentional 7kg weight loss. He reports intermittent abdominal discomfort and loose, foul-smelling stools that are difficult to flush. Examination reveals cachexia and epigastric tenderness. Blood tests show HbA1c 42 mmol/mol (6.0%) - significantly lower than his previous values of 75-85 mmol/mol (9-10%), fasting glucose 4.8 mmol/L, and lipase 25 U/L (normal). Faecal elastase is low at 80 μg/g. What is the most likely underlying diagnosis?

A. Chronic pancreatitis with exocrine insufficiency
B. Coeliac disease
C. Small bowel bacterial overgrowth
D. Pancreatic adenocarcinoma (Correct Answer)
E. Diabetic enteropathy

Explanation: ***Pancreatic adenocarcinoma*** - The sudden **paradoxical improvement in glycemic control** (HbA1c falling from 75-85 to 42 mmol/mol) in a long-standing diabetic, combined with significant **unintentional weight loss** and **cachexia**, is a major red flag for **pancreatic malignancy**. - **Steatorrhea** (foul-smelling, difficult-to-flush stools) and a **low fecal elastase** (indicating pancreatic exocrine insufficiency) in this clinical context strongly point towards a tumor causing duct obstruction and malabsorption. *Chronic pancreatitis with exocrine insufficiency* - While it causes **steatorrhea** and **low fecal elastase**, the relatively short 11-week history and rapid, profound **weight loss** are more suggestive of **malignancy** than a chronic inflammatory process. - It typically presents with a history of **recurrent acute pancreatitis** or chronic alcohol excess, and does not usually cause such a dramatic and sudden drop in **HbA1c**. *Coeliac disease* - This condition causes **malabsorption** and weight loss, but it does not account for the **low fecal elastase**, which is specific to pancreatic exocrine function. - It also does not explain the significant and rapid **improvement in glycemic control** seen in this patient, which is a critical clue. *Small bowel bacterial overgrowth* - SIBO can cause malabsorption symptoms, but it is rarely associated with such **profound cachexia** or the specific finding of a **low fecal elastase**, which indicates pancreatic insufficiency. - It also does not explain the **paradoxical improvement in diabetes control**, a key indicator in this case. *Diabetic enteropathy* - This is a complication of long-standing diabetes causing altered bowel motility, but it does not explain the **significant weight loss**, **low fecal elastase**, or the striking **improvement in glycemic control**. - It typically manifests as chronic diarrhea (often nocturnal) or constipation, not the severe malabsorptive picture with epigastric tenderness.

Question 78: A 47-year-old man presents with a 12-week history of profound fatigue, 6kg weight loss, and night sweats. He mentions recent onset of headaches and visual disturbances. Examination reveals bilateral papilloedema but no focal neurological signs. Blood tests show Hb 168 g/L, WCC 5.2 × 10⁹/L, platelets 520 × 10⁹/L, ESR 3 mm/hr, and corrected calcium 3.1 mmol/L. Chest X-ray shows bilateral hilar lymphadenopathy. What is the most likely diagnosis?

A. Sarcoidosis (Correct Answer)
B. Tuberculosis
C. Lymphoma
D. Lung cancer with brain metastases
E. Primary hyperparathyroidism

Explanation: ***Sarcoidosis*** - The presence of **bilateral hilar lymphadenopathy (BHL)** combined with **hypercalcaemia** (3.1 mmol/L) and a low **ESR** is highly characteristic of this granulomatous disease. - **Neurosarcoidosis** can lead to raised intracranial pressure and **papilloedema**, while extrarenal production of **1-alpha-hydroxylase** by macrophages causes elevated calcium. *Tuberculosis* - While **tuberculosis** can cause hilar lymphadenopathy and night sweats, it is usually associated with a significantly **elevated ESR** and pulmonary infiltrates. - TB-related lymphadenopathy is more often **asymmetrical** compared to the classic symmetrical bilateral pattern seen in sarcoidosis. *Lymphoma* - **Lymphoma** frequently presents with B-symptoms and mediastinal masses, but it typically presents with a **high ESR** and lacks the specific metabolic profile of hypercalcaemia seen here. - The **bilateral hilar** distribution is less common than bulky anterior mediastinal involvement in cases of lymphoma. *Lung cancer with brain metastases* - Although **lung cancer** could cause weight loss and brain metastases (leading to papilloedema), it would not explain the **bilateral hilar lymphadenopathy** in a non-smoker or the low ESR. - **Hypercalcaemia** in malignancy is usually due to PTHrP or bone destruction, but the radiographic BHL findings point more specifically to sarcoidosis. *Primary hyperparathyroidism* - **Primary hyperparathyroidism** causes hypercalcaemia and bone pain, but it does not cause **hilar lymphadenopathy** or systemic inflammatory symptoms like night sweats. - This diagnosis does not account for the **papilloedema** or significant weight loss observed in this patient.

Question 79: A 33-year-old man presents with a 7-week history of daily fever peaking at 39.2°C, typically occurring in the late afternoon. He reports a salmon-pink rash that appears during febrile episodes and resolves when the fever subsides. He has significant arthralgia affecting multiple joints, particularly wrists and knees, and complains of severe sore throat. Blood tests show WCC 18 × 10⁹/L (neutrophilia), ESR 95 mm/hr, CRP 180 mg/L, ferritin 8500 μg/L, negative rheumatoid factor, negative ANA, and negative blood cultures. What is the most likely diagnosis?

A. Adult-onset Still's disease (Correct Answer)
B. Systemic lupus erythematosus
C. Infective endocarditis
D. Acute rheumatic fever
E. Reactive arthritis

Explanation: ***Adult-onset Still's disease***- This patient exhibits the classic triad of **quotidian fever**, an **evanescent salmon-pink rash**, and arthralgia, along with a **severe sore throat** and **leukocytosis**.- A markedly elevated **ferritin level** (>1000 5g/L, 8500 5g/L in this case) combined with negative **RF** and **ANA** is highly characteristic and fulfills the **Yamaguchi criteria**.*Systemic lupus erythematosus*- While it can cause fever and arthralgia, it is typically associated with a **malar rash** and positive **ANA** or **anti-dsDNA** antibodies.- It usually presents with **leukopenia** or lymphopenia rather than the significant **neutrophilia** seen in this patient.*Infective endocarditis*- This condition presents with prolonged fever and elevated inflammatory markers but requires **positive blood cultures** or characteristic **vegetations on echocardiography**.- The transient **salmon-pink rash** and extreme **ferritin** elevation are not typical features of endocarditis.*Acute rheumatic fever*- This typically occurs in children or young adults following a **Group A Streptococcus** infection and follows the **Jones criteria**.- While it involves fever and arthritis, the **erythema marginatum** rash differs from the Still's rash, and extreme hyperferritinemia is not a feature.*Reactive arthritis*- Usually follows a **genitourinary** or **gastrointestinal infection** and presents with an asymmetric **oligoarthritis** often involving the lower limbs.- It is frequently associated with **extra-articular features** like conjunctivitis or urethritis, and does not cause the characteristic **high spiking daily fevers** of Still's disease.

Question 80: A 51-year-old woman presents with a 14-week history of fatigue and generalised muscle aches. She also reports a 5kg weight loss and intermittent low-grade fever. She has noted increasing stiffness in her hands, particularly in the mornings lasting over 2 hours. Examination reveals synovitis affecting the metacarpophalangeal and proximal interphalangeal joints bilaterally, with reduced grip strength. Blood tests show Hb 108 g/L, ESR 65 mm/hr, CRP 42 mg/L, rheumatoid factor positive (titre 1:320), and anti-CCP antibodies strongly positive. What is the most appropriate initial management strategy?

A. Urgent referral to rheumatology for assessment within 3 weeks and commence bridging oral corticosteroids (Correct Answer)
B. Start hydroxychloroquine and review in 4 weeks
C. Prescribe high-dose NSAIDs and arrange routine rheumatology referral
D. Commence methotrexate in primary care and arrange follow-up in 2 weeks
E. Arrange for blood tests to be repeated in 4 weeks before considering referral

Explanation: ***Urgent referral to rheumatology for assessment within 3 weeks and commence bridging oral corticosteroids*** - The patient's presentation with **persistent synovitis**, positive **rheumatoid factor (RF)** and **anti-CCP antibodies**, and high inflammatory markers strongly indicates active Rheumatoid Arthritis (RA), necessitating an **urgent referral** to a rheumatologist, ideally within 3 weeks, as per guidelines. - **Bridging oral corticosteroids** are appropriate to rapidly reduce inflammation and provide symptomatic relief, minimizing pain and joint damage while awaiting specialist assessment and the initiation of a definitive **DMARD (Disease-Modifying Antirheumatic Drug)**. *Start hydroxychloroquine and review in 4 weeks* - **Hydroxychloroquine** is a relatively mild DMARD and would likely be insufficient monotherapy for this patient's severe and **seropositive RA** with systemic features and high inflammatory markers. - Initiating DMARDs for active RA should generally be done by a **rheumatologist** after a confirmed diagnosis and comprehensive evaluation. *Prescribe high-dose NSAIDs and arrange routine rheumatology referral* - **NSAIDs** only offer symptomatic relief and do not alter the **disease course** or prevent **joint destruction** in RA; they are not disease-modifying. - A **routine referral** is inappropriate and would cause a critical delay, missing the

Question 81: A 68-year-old woman presents with a 9-week history of profound fatigue, 8kg unintentional weight loss, and low-grade fever. She describes feeling generally unwell with poor appetite. Examination reveals generalised lymphadenopathy including cervical, axillary, and inguinal nodes, the largest being 3cm in diameter, firm and non-tender. Her spleen is palpable 4cm below the costal margin. Blood tests show Hb 92 g/L, WCC 28 × 10⁹/L with absolute lymphocytosis, and LDH 650 U/L. Blood film shows mature-appearing small lymphocytes and smudge cells. What is the most likely diagnosis?

A. Chronic lymphocytic leukaemia (Correct Answer)
B. Hodgkin lymphoma
C. Non-Hodgkin lymphoma (follicular type)
D. Acute lymphoblastic leukaemia
E. Infectious mononucleosis

Explanation: ***Chronic lymphocytic leukaemia*** - The presence of **absolute lymphocytosis** with **mature-appearing small lymphocytes** and pathognomonic **smudge cells** (Gumprecht shadows) on a blood film is diagnostic of CLL. - This patient exhibits advanced disease markers including **splenomegaly**, **generalised lymphadenopathy**, and constitutional "B symptoms" like **unintentional weight loss** and fever. *Hodgkin lymphoma* - Typically presents with **localized lymphadenopathy** (often cervical) that may be painful after alcohol consumption, rather than a primary absolute lymphocytosis. - Diagnosis requires a lymph node biopsy showing characteristic **Reed-Sternberg cells**, which are not found in the peripheral blood film. *Non-Hodgkin lymphoma (follicular type)* - Usually presents with painless, **waxing and waning lymphadenopathy** and often lacks the significant peripheral lymphocytosis seen in CLL. - While it can manifest in the blood, the cell morphology typically shows notched or **cleaved nuclei**, not the fragility resulting in smudge cells. *Acute lymphoblastic leukaemia* - Characterized by an acute onset of bone marrow failure and the presence of **immature lymphoblasts** (large cells with prominent nucleoli) on the blood film. - It is much more common in **children**, whereas CLL is a disease of the elderly with a more indolent progression. *Infectious mononucleosis* - Presents with fever, sore throat, and lymphadenopathy, but the blood film shows **atypical lymphocytes** (Downey cells) rather than mature small lymphocytes. - Primarily affects **younger adults** and is associated with a positive **Monospot test** or EBV serology.

Question 82: According to the British Pain Society guidelines for pain assessment in primary care, which of the following validated tools is most appropriate for assessing pain in a patient with cognitive impairment who cannot self-report?

A. Abbey Pain Scale (Correct Answer)
B. Brief Pain Inventory
C. McGill Pain Questionnaire
D. Visual Analogue Scale
E. Numerical Rating Scale

Explanation: ***Abbey Pain Scale*** - This tool is specifically designed for **observational pain assessment** in patients with **dementia** or severe **cognitive impairment** who are unable to provide a verbal self-report. - It evaluates six domains including **vocalisation**, **facial expression**, and **behavioural changes**, making it the most appropriate for non-verbal patients in this context. *Brief Pain Inventory* - This is a **self-report multidimensional tool** used to assess the severity of pain and the impact of pain on daily functions. - It is unsuitable for this patient because it requires the ability to understand and answer complex questions about **pain interference**. *McGill Pain Questionnaire* - This tool uses **descriptive adjectives** (e.g., stabbing, gnawing) to evaluate the quality and intensity of pain. - It is inappropriate here as it relies heavily on the patient's **linguistic ability** and abstract thinking to categorise their sensations. *Visual Analogue Scale* - This is a **unidimensional measure** where a patient marks their pain level on a 10cm line ranging from 'no pain' to 'worst imaginable pain'. - It requires significant **abstract reasoning** and motor coordination, which are often lost in patients with advanced **cognitive impairment**. *Numerical Rating Scale* - This involves the patient rating their pain on a scale from **0 to 10**, where 0 is no pain and 10 is the worst pain possible. - Like other **self-report tools**, it is ineffective when a patient lacks the **cognitive capacity** to translate their physical sensation into a numerical value.

Question 83: A 42-year-old man presents with a 13-week history of intermittent fever up to 38.5°C, night sweats, and unintentional 4kg weight loss. He recently returned from a 6-month volunteer placement in rural Kenya. Examination reveals mild hepatosplenomegaly and no lymphadenopathy. Initial blood tests show Hb 105 g/L, WCC 3.2 × 10⁹/L (neutrophils 1.8, lymphocytes 1.1), platelets 95 × 10⁹/L, and ESR 78 mm/hr. Three blood cultures taken during febrile episodes are negative. What is the most appropriate next investigation?

A. Bone marrow aspiration and culture (Correct Answer)
B. HIV test and viral load
C. Mantoux test and interferon-gamma release assay
D. Abdominal CT scan with contrast
E. Serology for brucellosis and Q fever

Explanation: ***Bone marrow aspiration and culture*** - This patient presents with symptoms of **Visceral Leishmaniasis (Kala-azar)**, characterized by long-term fever, **pancytopenia**, **hepatosplenomegaly**, and a high **ESR** following travel to an endemic region like Kenya. - **Bone marrow aspiration** is the gold standard for diagnosis as it reveals **Leishmania amastigotes** (Donovan bodies) within macrophages and provides material for culture on **NNN medium**. *HIV test and viral load* - While HIV can present with fever and weight loss, it does not typically cause **massive splenomegaly** or this specific pattern of **pancytopenia** without opportunistic infections. - Although important for screening in travelers, it is less likely than a parasitic infection to be the primary cause of this specific clinical presentation. *Mantoux test and interferon-gamma release assay* - Though **Tuberculosis** can cause fever and weight loss, it typically presents with **respiratory symptoms** or localized lymphadenopathy rather than massive organomegaly and pancytopenia. - These tests screen for **latent TB**, whereas the patient's presentation suggests a systemic infection requiring definitive diagnostic sampling. *Abdominal CT scan with contrast* - A CT scan would confirm **hepatosplenomegaly**, which has already been identified on clinical examination, but it would not provide a definitive **microbiological diagnosis**. - It is useful for anatomical assessment but does not help in identifying the specific **parasitic or infectious etiology** suggested by the hematological findings. *Serology for brucellosis and Q fever* - **Brucellosis** and **Q fever** are causes of fever of unknown origin, but they typically do not cause the profound **pancytopenia** seen in this patient. - While they should be considered if first-line investigations are negative, they are less characteristic for **sub-Saharan African** travel presenting with this high a degree of marrow suppression.

Question 84: A 56-year-old woman presents with a 10-week history of unintentional weight loss of 5kg and fatigue. She reports no specific gastrointestinal symptoms but notes occasional abdominal discomfort. Examination reveals a palpable mass in the right upper quadrant. Blood tests show Hb 118 g/L, platelets 450 × 10⁹/L, albumin 32 g/L, ALP 180 U/L, ALT 65 U/L, and CA 19-9 significantly elevated. What is the most appropriate next investigation?

A. CT scan of abdomen and pelvis with contrast (Correct Answer)
B. Upper gastrointestinal endoscopy
C. Colonoscopy
D. Ultrasound scan of abdomen
E. Chest X-ray

Explanation: ***CT scan of abdomen and pelvis with contrast*** - The combination of **unintentional weight loss**, a **palpable right upper quadrant mass**, elevated **ALP** and **ALT**, and significantly raised **CA 19-9** strongly indicates a **pancreatic or hepatobiliary malignancy**. - A **contrast-enhanced CT scan** is the most appropriate next investigation as it provides comprehensive anatomical information for **diagnosis**, **staging**, and assessing **resectability** of such tumors. *Upper gastrointestinal endoscopy* - This procedure is primarily indicated for evaluating conditions affecting the **esophagus**, **stomach**, or **duodenum**, such as ulcers or tumors. - While abdominal discomfort is present, it would not effectively visualize a mass in the **pancreas**, **biliary tree**, or **retroperitoneum**, which are highly suspected here. *Colonoscopy* - Colonoscopy is the gold standard for investigating **colorectal pathology**, typically for symptoms like altered bowel habits, rectal bleeding, or iron-deficiency anemia. - The patient's presentation with an **RUQ mass** and elevated **CA 19-9** makes primary colorectal cancer less likely as the immediate cause. *Ultrasound scan of abdomen* - An ultrasound can be useful for initial assessment of the liver, gallbladder, and kidneys but often has limited sensitivity for detailed visualization of the **pancreas** due to **overlying bowel gas**. - Given the strong suspicion of malignancy and the need for accurate **staging**, a **CT scan** is superior for a definitive diagnosis and treatment planning. *Chest X-ray* - A chest X-ray is typically performed to evaluate for **pulmonary metastases** once a primary malignancy has been identified and localized. - It would not provide any diagnostic information regarding the **primary abdominal mass** itself, making it an unsuitable *first* diagnostic investigation in this context.

Question 85: A 49-year-old woman with metastatic breast cancer presents for review of pain management. She reports severe bone pain (8/10) despite taking morphine sulfate modified-release 60mg twice daily and paracetamol 1g four times daily. She is using 4-6 doses of oral morphine 10mg (breakthrough analgesia) daily. She experiences no significant side effects from current medication. What is the most appropriate modification to her pain management regimen?

A. Increase modified-release morphine to 90mg twice daily and breakthrough dose to 15mg (Correct Answer)
B. Add ibuprofen 400mg three times daily to current opioid regimen
C. Switch to transdermal fentanyl patch 50 micrograms/hour every 72 hours
D. Add gabapentin 300mg at night, titrating to 300mg three times daily
E. Increase breakthrough morphine dose to 20mg while maintaining background analgesia

Explanation: ***Increase modified-release morphine to 90mg twice daily and breakthrough dose to 15mg*** - Frequent breakthrough pain (4-6 doses daily) indicates inadequate **background analgesia**; the total daily morphine intake (current 120mg MR + 40-60mg breakthrough = 160-180mg) must be consolidated into the **regular dosing schedule**. - The correct titration involves increasing the **modified-release (MR)** dose (e.g., by 25-50% from the current dose or by consolidating breakthrough opioid use) and recalculating the **breakthrough dose** to be approximately **1/6th to 1/10th** of the new total 24-hour dose. *Add ibuprofen 400mg three times daily to current opioid regimen* - While **NSAIDs** are effective for **metastatic bone pain** (WHO ladder Step 2 addition), they do not address the immediate need to titrate the already established opioid dose for this level of severe pain. - Simply adding ibuprofen would be insufficient when the patient is requiring high-frequency **breakthrough morphine** doses daily, indicating a need for higher opioid baseline. *Switch to transdermal fentanyl patch 50 micrograms/hour every 72 hours* - **Transdermal fentanyl** is generally reserved for patients with **stable pain** requirements who cannot tolerate oral medications or for convenience; it is difficult to titrate in acute pain escalation. - Switching to a different opioid (**opioid rotation**) is not indicated here as the patient is not experiencing **toxicity** or significant **side effects** from morphine. *Add gabapentin 300mg at night, titrating to 300mg three times daily* - This patient describes **bone pain**, which is typically **nociceptive**; **gabapentin** is indicated for **neuropathic pain**, characterized by burning, shooting, or electric-shock sensations. - Adding an adjuvant for the wrong pain type will not resolve the **inadequate opioid titration** for her nociceptive metastatic pain. *Increase breakthrough morphine dose to 20mg while maintaining background analgesia* - Increasing only the **breakthrough dose** without adjusting the **background dose** leads to erratic pain control and does not provide constant analgesia. - Standard palliative care practice dictates that if more than **two doses** of breakthrough analgesia are needed daily, the **modified-release dose** should be increased.

Question 86: A 55-year-old woman presents with a 15-week history of fatigue and widespread musculoskeletal pain. She describes morning stiffness in her hands lasting 30 minutes, and pain particularly affecting the small joints of her hands and feet. Examination reveals swelling of the MCP and PIP joints bilaterally with tenderness. Blood tests show: Hb 108 g/L, CRP 34 mg/L, ESR 42 mm/hr, rheumatoid factor negative, anti-CCP negative. What is the most appropriate management?

A. Diagnose seronegative inflammatory arthritis and start sulfasalazine
B. Reassure that negative antibodies exclude inflammatory arthritis and manage symptomatically
C. Refer urgently to rheumatology for assessment within 3 working days (Correct Answer)
D. Start prednisolone 15mg daily pending rheumatology review
E. Repeat rheumatoid factor and anti-CCP in 3 months to confirm diagnosis

Explanation: ***Refer urgently to rheumatology for assessment within 3 working days***- The patient's clinical presentation, including **symmetric synovitis** of the MCP and PIP joints, morning stiffness lasting >30 minutes, and duration >6 weeks, strongly suggests **inflammatory arthritis**, even with negative serology. - Early referral to rheumatology (within 3 working days for suspected inflammatory arthritis with objective synovitis) is crucial to facilitate timely diagnosis and initiation of **disease-modifying antirheumatic drugs (DMARDs)**, which significantly impacts long-term outcomes and prevents joint damage.*Diagnose seronegative inflammatory arthritis and start sulfasalazine*- While the clinical picture is consistent with **seronegative inflammatory arthritis**, the definitive diagnosis and initiation of specific **DMARDs** like sulfasalazine should be managed by a rheumatologist, not primary care.- Starting DMARDs without specialist confirmation can lead to misdiagnosis, inappropriate treatment, and potential side effects.*Reassure that negative antibodies exclude inflammatory arthritis and manage symptomatically*- This approach is incorrect as approximately 20-30% of patients with **rheumatoid arthritis** are **seronegative** (negative RF and anti-CCP), but still have significant disease requiring early treatment.- Reassurance and symptomatic management alone would delay appropriate treatment, increasing the risk of **irreversible joint damage** and functional impairment.*Start prednisolone 15mg daily pending rheumatology review*- Initiating **corticosteroids** in primary care can mask the clinical signs of **synovitis**, making the assessment and definitive diagnosis more challenging for the rheumatologist.- While sometimes used as a short-term

Question 87: A 67-year-old woman presents with an 11-week history of progressive fatigue, 7kg weight loss, and fever ranging from 37.8-38.6°C. She reports severe bilateral shoulder and hip girdle pain and stiffness, worst in the morning and lasting >1 hour. Examination shows limited active but full passive range of movement in shoulders. Blood tests show: Hb 102 g/L, ESR 88 mm/hr, CRP 92 mg/L, ALP 156 U/L (normal 30-130), normal calcium. What is the most critical next step in management?

A. Start prednisolone 15mg daily and review response in 1 week
B. Arrange urgent temporal artery ultrasound within 7 days
C. Request urgent temporal artery biopsy before starting steroids
D. Commence prednisolone 40-60mg daily immediately and arrange same-day ophthalmology assessment (Correct Answer)
E. Request urgent rheumatology review within 2 weeks for diagnostic confirmation

Explanation: ***Commence prednisolone 40-60mg daily immediately and arrange same-day ophthalmology assessment*** - The patient's presentation with PMR-like symptoms (bilateral shoulder/hip girdle pain), constitutional symptoms (fever, weight loss), and markedly elevated inflammatory markers (**ESR 88, CRP 92**) in an elderly woman is highly suggestive of **Giant Cell Arteritis (GCA)**. - Immediate initiation of **high-dose corticosteroids** (prednisolone 40-60mg daily) is crucial to prevent irreversible **vision loss** or other ischemic complications, and same-day ophthalmology assessment is essential to evaluate for ocular involvement. *Start prednisolone 15mg daily and review response in 1 week* - A prednisolone dose of 15mg daily is appropriate for uncomplicated **Polymyalgia Rheumatica (PMR)**, but it is insufficient to prevent the potentially catastrophic ischemic complications of GCA. - Delaying appropriate **high-dose steroid** treatment for a week, especially in the presence of systemic symptoms, significantly increases the risk of **permanent blindness**. *Arrange urgent temporal artery ultrasound within 7 days* - While an **urgent temporal artery ultrasound** (looking for a **halo sign**) is a useful diagnostic tool for GCA, treatment with glucocorticoids should **never be delayed** for imaging studies. - A 7-day wait for an ultrasound is clinically unacceptable as GCA is a **medical emergency** requiring immediate intervention to prevent irreversible vascular damage. *Request urgent temporal artery biopsy before starting steroids* - **Temporal artery biopsy** is the gold standard for confirming GCA, but its performance should **not delay** the immediate administration of vision-saving corticosteroids. - Pathological features of GCA remain identifiable on biopsy for at least **1-2 weeks** after steroid initiation, allowing time for the biopsy after treatment has begun. *Request urgent rheumatology review within 2 weeks for diagnostic confirmation* - Waiting two weeks for a **rheumatology review** is far too long for suspected GCA, which requires **emergency management** due to the acute risk of severe complications. - Primary care clinicians should initiate **high-dose steroids** immediately upon suspicion of GCA, rather than awaiting specialist confirmation, to prevent **irreversible vision loss or stroke**.

Question 88: A 38-year-old woman presents with a 14-week history of widespread pain affecting her neck, shoulders, back, and thighs, associated with severe fatigue and unrefreshing sleep. Pain intensity fluctuates between 5-8/10. She also reports memory problems and frequent headaches. Examination shows multiple tender points but no joint swelling or neurological deficit. Blood tests including FBC, CRP, ESR, TFTs, CK, and vitamin D are all normal. Which additional assessment tool is most appropriate to support diagnosis and guide management?

A. Brief Pain Inventory (BPI) to assess pain severity and interference with function
B. Hospital Anxiety and Depression Scale (HADS) to screen for mood disorders
C. Widespread Pain Index and Symptom Severity Score for fibromyalgia assessment (Correct Answer)
D. Short Form-36 (SF-36) to measure health-related quality of life
E. EuroQol-5D (EQ-5D) to evaluate overall health status

Explanation: ***Widespread Pain Index and Symptom Severity Score for fibromyalgia assessment*** - The patient's presentation with **chronic widespread pain** (neck, shoulders, back, thighs for 14 weeks), **severe fatigue**, **unrefreshing sleep**, **memory problems**, and **multiple tender points**, with normal inflammatory markers, is highly characteristic of **fibromyalgia**. - The **Widespread Pain Index (WPI)** and **Symptom Severity (SS) score** are the core components of the **2010/2016 American College of Rheumatology (ACR) diagnostic criteria** for fibromyalgia, directly assessing the required pain distribution and symptom severity. *Brief Pain Inventory (BPI) to assess pain severity and interference with function* - While the **Brief Pain Inventory (BPI)** is a valuable tool for quantifying **pain intensity** and its impact on daily activities, it is a general pain assessment and not specific enough to diagnose **fibromyalgia** based on its unique criteria. - It does not specifically assess the **widespread distribution of pain** or the severity of associated symptoms like fatigue and cognitive issues, which are central to a fibromyalgia diagnosis. *Hospital Anxiety and Depression Scale (HADS) to screen for mood disorders* - **Anxiety** and **depression** are common comorbidities in patients with fibromyalgia, and screening with **HADS** is often an important part of comprehensive management. - However, **HADS** is a screening tool for psychological distress and does not serve as a primary diagnostic instrument for the physical condition of **fibromyalgia** itself. *Short Form-36 (SF-36) to measure health-related quality of life* - The **Short Form-36 (SF-36)** is a generic health status questionnaire used to measure **health-related quality of life** across various domains, including physical and mental health. - While useful for tracking the overall impact of a chronic condition, it lacks the specificity to function as a diagnostic tool for **fibromyalgia**, which requires assessment of specific pain locations and symptom clusters. *EuroQol-5D (EQ-5D) to evaluate overall health status* - The **EuroQol-5D (EQ-5D)** is a standardized measure of **health status** and is often used in health economics and population studies to generate quality-adjusted life years (QALYs). - Similar to the SF-36, it provides a general overview of a patient's health but does not offer the detailed clinical criteria necessary for the specific diagnosis of **fibromyalgia**.

Question 89: A 71-year-old man presents with a 12-week history of lower back pain radiating to both legs, associated with difficulty walking more than 50 metres. The pain is worse when walking and relieved by sitting or leaning forward. He describes numbness in his feet and reports recent urinary hesitancy. Neurological examination shows preserved power but reduced sensation in L5/S1 distribution bilaterally and absent ankle reflexes. What is the most likely diagnosis?

A. Lumbar spinal stenosis with neurogenic claudication (Correct Answer)
B. Cauda equina syndrome requiring emergency imaging
C. Peripheral arterial disease causing vascular claudication
D. Degenerative lumbar disc disease with bilateral radiculopathy
E. Diabetic polyneuropathy with associated mechanical back pain

Explanation: ***Lumbar spinal stenosis with neurogenic claudication*** - The patient exhibits classic **neurogenic claudication**, where leg pain and numbness are triggered by walking and specifically relieved by **sitting or leaning forward** (shopping cart sign), which increases the spinal canal diameter. - Clinical findings of **bilateral L5/S1 sensory loss** and **absent ankle reflexes** in an elderly patient further support chronic compression of the cauda equina nerve roots. *Cauda equina syndrome requiring emergency imaging* - This syndrome is a surgical emergency typically presenting with **acute urinary retention**, **saddle anesthesia**, and significant fecal incontinence or motor weakness, which are not acutely severe in this 12-week presentation. - While the patient has urinary hesitancy, the 12-week progression and **postural relief** are more characteristic of stable spinal stenosis than an acute, urgent cauda equina compression. *Peripheral arterial disease causing vascular claudication* - **Vascular claudication** is relieved simply by standing still and is not dependent on spinal posture (flexion), unlike neurogenic claudication. - It is usually associated with **diminished peripheral pulses** and skin changes, rather than the dermatomal sensory loss and absent reflexes seen in this case. *Degenerative lumbar disc disease with bilateral radiculopathy* - Lumbar disc herniation most commonly presents with **unilateral radiculopathy** (sciatica) and often worsens with spinal flexion, the opposite of this patient's presentation. - While it causes back pain, it does not typically produce the specific **claudicant pattern** where walking distance is consistently limited and relieved by bending forward. *Diabetic polyneuropathy with associated mechanical back pain* - **Diabetic neuropathy** usually presents with a "stocking-glove" distribution of sensory loss rather than the specific **L5/S1 nerve root distribution** observed. - It does not explain the mechanical symptoms of **claudication** or the immediate relief of symptoms upon leaning forward.

Question 90: A 52-year-old man with no significant medical history presents with a 6-week history of fever (documented temperatures 38.3-39.1°C), generalized myalgia, and a 5kg weight loss. Examination reveals no focal abnormalities. Initial blood tests show: Hb 108 g/L, WCC 11.2 x10⁹/L (neutrophils 8.1), CRP 78 mg/L, ESR 62 mm/hr. Blood cultures, urinalysis, and chest X-ray are normal. What is the most appropriate next investigation to arrange from primary care?

A. Arrange urgent CT chest, abdomen and pelvis with contrast
B. Request autoimmune screen including ANA, ANCA, and rheumatoid factor
C. Refer urgently to infectious diseases for echocardiography
D. Request HIV test, hepatitis serology, and QuantiFERON-TB Gold (Correct Answer)
E. Arrange urgent whole body PET-CT scan

Explanation: ***Request HIV test, hepatitis serology, and QuantiFERON-TB Gold*** - This patient presents with characteristics of **Fever of Unknown Origin (FUO)**, including a 6-week fever (>38.3°C), systemic symptoms (myalgia, weight loss), and negative initial routine tests. - In primary care, a crucial next step in FUO is to systematically screen for common, treatable, and communicable infectious causes such as **HIV**, **viral hepatitis**, and **tuberculosis** through serology and specific tests like QuantiFERON-TB Gold. *Arrange urgent CT chest, abdomen and pelvis with contrast* - While **cross-sectional imaging** is a vital part of the FUO workup to detect occult sources like abscesses or malignancy, it typically follows an initial screen for common infectious diseases. - Ordering extensive imaging as a first step in primary care without ruling out basic infections may lead to unnecessary radiation exposure and could be less cost-effective. *Request autoimmune screen including ANA, ANCA, and rheumatoid factor* - **Autoimmune diseases** are common causes of FUO; however, an autoimmune screen is often performed after or concurrently with initial infectious disease screening, especially when specific clinical signs are absent. - These tests can lack specificity, and their interpretation can be challenging without additional **focal clinical findings** such as arthritis or rashes, which are not described in this patient. *Refer urgently to infectious diseases for echocardiography* - **Infective endocarditis** is a serious differential in FUO, but the patient has normal blood cultures, no new heart murmurs, and no other specific signs pointing towards cardiac involvement. - Urgent **echocardiography** is typically reserved for cases with higher suspicion, such as positive blood cultures, new valvular murmurs, or specific risk factors not present in this scenario. *Arrange urgent whole body PET-CT scan* - **PET-CT** is a highly sensitive imaging modality for identifying occult inflammation, infection, or malignancy, making it useful in complex FUO cases. - However, it is an advanced, expensive, and **specialist-led** investigation not typically performed as a first-line diagnostic test in primary care before basic infectious and inflammatory screens are completed.

Question 91: A 47-year-old woman presents with a 16-week history of profound fatigue, generalized aching, and cognitive difficulties ('brain fog'). Symptoms began after a documented COVID-19 infection. She has been unable to return to work. Examination and routine blood tests (FBC, U&E, LFTs, TFTs, CRP, glucose, ferritin) are all normal. She becomes breathless and experiences worsening fatigue for several days after minimal physical activity. What is the most appropriate management approach?

A. Refer to cardiology for exercise tolerance testing and cardiac MRI
B. Advise structured graded exercise programme starting with 10 minutes daily walking
C. Recommend pacing strategies and energy management with avoidance of post-exertional symptom exacerbation (Correct Answer)
D. Request CT pulmonary angiogram to exclude chronic thromboembolic disease
E. Prescribe low-dose amitriptyline for fatigue and pain management

Explanation: ***Recommend pacing strategies and energy management with avoidance of post-exertional symptom exacerbation***- This patient presents with a classic picture of **Post-COVID-19 syndrome** (long COVID) characterized by **profound fatigue**, **cognitive difficulties**, and critically, **post-exertional symptom exacerbation (PESE)**, where symptoms worsen significantly after minimal physical activity.- **NICE guidelines (NG188)** for long COVID emphasize a **personalized, symptom-led approach** focusing on **pacing strategies** and energy management to stay within an "energy envelope" and prevent symptom flare-ups. *Refer to cardiology for exercise tolerance testing and cardiac MRI*- While **COVID-19** can affect the heart (e.g., **myocarditis**), this patient's normal clinical examination and routine blood tests make primary cardiac pathology less likely as the sole cause of widespread symptoms.- **Exercise tolerance testing** in a patient with **post-exertional malaise (PEM)** is contraindicated, as it can trigger severe and prolonged symptom exacerbation, worsening their condition. *Advise structured graded exercise programme starting with 10 minutes daily walking*- **Graded Exercise Therapy (GET)** is specifically *not* recommended and potentially harmful for patients experiencing **post-exertional symptom exacerbation (PESE)** in long COVID, as it can lead to a long-term decline in function.- Management should be **symptom-contingent** and aim to prevent overexertion rather than encouraging a fixed, incremental increase in activity. *Request CT pulmonary angiogram to exclude chronic thromboembolic disease*- Although **pulmonary embolism** is a potential complication post-COVID, this patient's generalized symptoms (fatigue, brain fog) and normal routine blood tests make a **CTPA** less indicated as a first-line investigation.- A **CTPA** involves significant radiation and is typically reserved for cases with stronger evidence of pulmonary vascular pathology, such as unexplained dyspnea with abnormal D-dimer or hypoxemia. *Prescribe low-dose amitriptyline for fatigue and pain management*- **Amitriptyline** may help with neuropathic pain or to aid sleep, but it does not directly address the core pathophysiology or management of **Post-COVID-19 fatigue** or cognitive impairment.- Pharmacological interventions for long COVID symptoms are generally considered **adjuncts** and should not replace the primary strategy of **activity management**, pacing, and multidisciplinary supportive care.

Question 92: A 36-year-old refugee from Sudan presents with a 10-week history of daily fever up to 38.9°C, 8kg weight loss, night sweats, and dry cough. He arrived in the UK 4 months ago. Chest examination reveals reduced breath sounds at the right apex. Chest X-ray shows right upper lobe consolidation with cavitation. What is the most appropriate immediate management while awaiting confirmation of diagnosis?

A. Start standard quadruple anti-tuberculosis therapy and arrange respiratory isolation (Correct Answer)
B. Prescribe amoxicillin 500mg three times daily for suspected community-acquired pneumonia
C. Obtain three sputum samples for acid-fast bacilli and await results before treatment
D. Refer urgently to respiratory medicine for same-day assessment and bronchoscopy
E. Start rifampicin and isoniazid only pending culture and sensitivity results

Explanation: ***Start standard quadruple anti-tuberculosis therapy and arrange respiratory isolation*** - The patient presents with classic symptoms of **pulmonary tuberculosis (TB)**, including night sweats, weight loss, and **upper lobe cavitation**, necessitating immediate **quadruple therapy** (RIPE) due to high clinical suspicion. - **Respiratory isolation** is critical in the immediate management to prevent public health transmission, especially given the high risk of **infectivity** associated with cavitary disease. *Prescribe amoxicillin 500mg three times daily for suspected community-acquired pneumonia* - Amoxicillin is ineffective against **Mycobacterium tuberculosis** and is inappropriate for a presentation lasting 10 weeks with **cavitary lesions**. - This delay in correct treatment would allow for continued **disease progression** and potential community spread of TB. *Obtain three sputum samples for acid-fast bacilli and await results before treatment* - While **sputum samples** are essential for diagnosis, treatment should not be delayed in a highly symptomatic patient with **radiological evidence** of cavitation. - Awaiting results can take days for microscopy and weeks for **cultures**, increasing the risk of respiratory failure or transmission. *Refer urgently to respiratory medicine for same-day assessment and bronchoscopy* - **Bronchoscopy** is generally reserved for cases where sputum samples are negative but clinical suspicion remains, and is not the primary immediate step. - Immediate management involves starting **empirical treatment** and isolation rather than invasive procedures that may aerosolize the bacteria. *Start rifampicin and isoniazid only pending culture and sensitivity results* - Using only two drugs for active TB induction risks the development of **multi-drug resistance (MDR-TB)**. - Standard initial phase treatment requires **four drugs** (rifampicin, isoniazid, pyrazinamide, and ethambutol) to cover potential primary resistance.

Question 93: According to current NICE guidance, what is the recommended threshold for urgent direct access chest X-ray in adults presenting with unexplained weight loss in primary care?

A. Any unexplained weight loss of more than 3kg in 3 months
B. Unexplained weight loss combined with any respiratory symptoms
C. Weight loss of 5% or more of body weight over 6 months
D. Weight loss in patients aged 40 and over who have ever smoked (Correct Answer)
E. Unexplained weight loss of more than 5kg in patients aged 50 and over

Explanation: ***Weight loss in patients aged 40 and over who have ever smoked*** - According to **NICE NG12 guidelines**, an urgent direct access **chest X-ray** (within 2 weeks) is recommended for individuals aged **40 years or older** with unexplained weight loss who have ever smoked. - This specific criterion targets a high-risk population for **lung cancer**, where unexplained weight loss can be an early and significant indicator. *Any unexplained weight loss of more than 3kg in 3 months* - NICE guidance for urgent direct access chest X-ray does not specify a **fixed numerical weight loss threshold** (e.g., 3kg) or a strict timeframe of 3 months. - While clinically relevant, this specific metric is not the **trigger for chest imaging** in the context of **lung cancer suspicion** under NICE NG12. *Unexplained weight loss combined with any respiratory symptoms* - While **respiratory symptoms** like cough, dyspnoea, or haemoptysis would increase suspicion, the NICE guidance allows for a direct access chest X-ray based solely on **age and smoking history** combined with unexplained weight loss. - The presence of respiratory symptoms would independently trigger referral pathways but is not a *necessary* condition when the **age and smoking** criteria are met. *Weight loss of 5% or more of body weight over 6 months* - This is a general clinical definition for **significant unintentional weight loss** and is often used in broader contexts of malignancy or chronic disease. - However, it is not the **specific criterion** outlined by NICE for urgent direct access chest X-ray in the context of **lung cancer screening** based on unexplained weight loss. *Unexplained weight loss of more than 5kg in patients aged 50 and over* - The **age threshold** for this specific NICE guideline is **40 years and over**, not 50 years. - Additionally, similar to other incorrect options, a specific **weight threshold (5kg)** is not the defining criterion in the **NICE NG12** guidance for urgent chest X-ray for unexplained weight loss.

Question 94: A 61-year-old woman presents with a 13-week history of fatigue and unintentional 9kg weight loss. She reports increased thirst and urinary frequency. Blood tests show: glucose 18.2 mmol/L, HbA1c 98 mmol/mol, creatinine 145 μmol/L (baseline 78 μmol/L 6 months ago), eGFR 34 ml/min/1.73m² (previously 68). Urinalysis shows glucose 3+, ketones 1+, protein 2+. Blood pressure is 168/96 mmHg. What is the most appropriate initial management approach?

A. Start metformin 500mg twice daily with lifestyle advice and review in 2 weeks
B. Admit urgently to hospital for assessment of possible diabetic ketoacidosis
C. Start insulin therapy as outpatient with diabetes specialist nurse support within 24 hours (Correct Answer)
D. Refer routinely to diabetes specialist team and commence lifestyle measures
E. Start gliclazide 40mg once daily and arrange diabetes education programme

Explanation: ***Start insulin therapy as outpatient with diabetes specialist nurse support within 24 hours*** - The patient presents with **marked weight loss**, **osmotic symptoms**, and **ketonuria (1+)**, indicating a state of significant **insulin deficiency** that requires urgent management. - **Insulin therapy** is indicated at the time of diagnosis for patients with Type 2 Diabetes who exhibit severe hyperglycemia and significant metabolic decompensation without evidence of life-threatening acidosis. *Start metformin 500mg twice daily with lifestyle advice and review in 2 weeks* - **Metformin** is contraindicated in this patient as her **eGFR (34 ml/min/1.73m²)** is below the safe threshold of 45-30 ml/min for initiation. - Given the severe metabolic symptoms and high **HbA1c**, metformin mono-therapy would be inadequate to achieve rapid glycemic control. *Admit urgently to hospital for assessment of possible diabetic ketoacidosis* - **Diabetic Ketoacidosis (DKA)** typically involves significant ketosis (usually ≥2+ on urine or ≥3.0 mmol/L blood) and clinical symptoms of **acidosis** such as vomiting or Kussmaul breathing, which are not present here. - While the patient has metabolic decompensation, **1+ ketones** in an otherwise hemodynamically stable patient can often be managed safely in the community with urgent specialist support. *Refer routinely to diabetes specialist team and commence lifestyle measures* - **Routine referral** is inappropriate due to the risk of rapid clinical deterioration given the patient's significant **unintentional weight loss** and severe hyperglycemia. - Relying solely on **lifestyle measures** would be insufficient and dangerous in the presence of existing metabolic decompensation and ketonuria. *Start gliclazide 40mg once daily and arrange diabetes education programme* - **Gliclazide** (a sulfonylurea) carries a high risk of **hypoglycemia** in patients with deteriorating renal function (AKI indicated by the drop in eGFR). - **Sulfonylureas** are generally less effective and less appropriate than insulin for a patient presenting with clear signs of insulin exhaustion and ketosis.

Question 95: A 43-year-old man with poorly controlled type 2 diabetes presents with a 9-week history of severe, burning pain in both feet, rated 7/10, worse at night. The pain is interfering with sleep and daily activities. Examination shows reduced vibration sense and absent ankle reflexes bilaterally. HbA1c is 86 mmol/mol (normal <42). He has tried paracetamol without benefit. What is the most appropriate first-line pharmacological treatment?

A. Amitriptyline 10mg at night, titrating up to 75mg as tolerated
B. Codeine phosphate 30-60mg four times daily as required
C. Pregabalin 75mg twice daily, titrating up to 300mg twice daily
D. Duloxetine 60mg once daily in the morning (Correct Answer)
E. Tramadol 50mg four times daily with regular review

Explanation: ***Duloxetine 60mg once daily in the morning*** - **Duloxetine** is a **serotonin-norepinephrine reuptake inhibitor (SNRI)** and is recommended as a first-line pharmacological treatment for **painful diabetic neuropathy** according to major guidelines. - It can be started at a therapeutic dose of 60mg once daily, offering a simpler regimen and often better adherence compared to medications requiring slow titration. *Amitriptyline 10mg at night, titrating up to 75mg as tolerated* - While **tricyclic antidepressants (TCAs)** like amitriptyline are effective first-line agents for neuropathic pain, the starting dose of 10mg is very low and may delay therapeutic benefit for severe pain. - Higher doses (e.g., 75mg) are associated with significant **anticholinergic side effects** such as dry mouth, constipation, sedation, and urinary retention, which can be problematic, especially in older diabetic patients. *Codeine phosphate 30-60mg four times daily as required* - **Opioids** are generally not recommended for the long-term management of **chronic neuropathic pain** due to limited efficacy, high risk of dependence, and significant side effects. - Codeine specifically carries a risk of **dependence**, tolerance, and common side effects like severe **constipation** and nausea, which are unsuitable for first-line chronic pain management. *Pregabalin 75mg twice daily, titrating up to 300mg twice daily* - **Pregabalin** is also a valid first-line option for neuropathic pain; however, it typically requires a **twice-daily dosing** schedule and careful **titration** over several weeks to reach an effective dose. - Common side effects include **dizziness**, somnolence, peripheral edema, and weight gain, which might be less desirable or require closer monitoring in patients with diabetes. *Tramadol 50mg four times daily with regular review* - **Tramadol** is a weak opioid and SNRI that should be considered as a second or third-line agent, or for short-term 'rescue' for acute exacerbations, not as a standard first-line long-term therapy for chronic neuropathic pain. - It carries risks of **addiction**, **serotonin syndrome** if co-administered with other serotonergic drugs, and common opioid side effects.

Question 96: Which of the following clinical features most reliably distinguishes systemic inflammatory conditions from localized infections as a cause of fever of unknown origin in primary care assessment?

A. Fever pattern showing regular daily spikes above 39°C
B. Presence of elevated inflammatory markers (CRP >100 mg/L)
C. Multiple organ system involvement with no identifiable focus of infection (Correct Answer)
D. Duration of fever exceeding 3 weeks despite investigation
E. Absence of response to empirical broad-spectrum antibiotics

Explanation: ***Multiple organ system involvement with no identifiable focus of infection*** - **Systemic inflammatory conditions** are characterized by clinical manifestations across several domains, such as **arthralgia**, **rashes**, or **serositis**, without a localized anatomical nidus. - Localized infections typically present with symptoms limited to a **specific anatomical site**, whereas multi-system involvement in the absence of an identifiable source is highly indicative of **autoimmune** or **vasculitic** processes. *Fever pattern showing regular daily spikes above 39°C* - While some conditions like **Adult-Onset Still’s Disease** exhibit daily spikes, fever patterns are generally considered **non-specific** for distinguishing between infection and inflammation. - Modern clinical practice has found that most classic fever curves lack the **sensitivity** or **specificity** to reliably confirm a diagnosis without other clinical evidence. *Presence of elevated inflammatory markers (CRP >100 mg/L)* - Significant elevation of **C-Reactive Protein (CRP)** is a hallmark of both **acute bacterial infections** and systemic inflammatory states like **vasculitis**. - Because inflammatory markers are **non-specific acute phase reactants**, they cannot be used to reliably differentiate between the two categories of disease. *Duration of fever exceeding 3 weeks despite investigation* - A duration of over **3 weeks** is a core component of the standard definition of **Fever of Unknown Origin (FUO)** but does not help categorize the etiology. - Both **occult infections** (like Tuberculosis or deep-seated abscesses) and **connective tissue diseases** can persist for several weeks or months. *Absence of response to empirical broad-spectrum antibiotics* - Failure to respond to antibiotics can suggest a **non-infectious cause**, but it is not definitive as many infections (e.g., **resistant bacteria**, **fungi**, or **tuberculosis**) also fail standard regimens. - Empirical antibiotic use is generally discouraged in FUO as it can mask symptoms and **delay the diagnosis** of both infectious and inflammatory conditions.

Question 97: A 24-year-old medical student presents with a 7-week history of persistent fatigue, difficulty concentrating, and feeling overwhelmed. She reports poor sleep quality, waking unrefreshed, and has gained 4kg. She denies low mood but feels constantly tired despite sleeping 9 hours nightly. Examination is unremarkable. Blood tests show TSH 6.8 mU/L (normal 0.4-4.0), free T4 12 pmol/L (normal 9-25). What is the most appropriate management?

A. Repeat thyroid function tests in 3 months with clinical review
B. Commence levothyroxine 50 micrograms daily
C. Request thyroid peroxidase antibodies and commence treatment if positive (Correct Answer)
D. Reassure and advise on sleep hygiene measures only
E. Refer to endocrinology for specialist assessment

Explanation: ***Request thyroid peroxidase antibodies and commence treatment if positive***- The patient presents with **subclinical hypothyroidism** (elevated TSH 6.8 mU/L with normal free T4 12 pmol/L) and symptoms such as **persistent fatigue**, difficulty concentrating, and weight gain; checking **thyroid peroxidase (TPO) antibodies** helps determine the autoimmune etiology and risk of progression to overt hypothyroidism.- According to **NICE guidelines**, treatment with **levothyroxine** should be considered for patients under 65 with a TSH between 4–10 mU/L if they are **symptomatic** and test positive for **TPO antibodies**, as this indicates a higher likelihood of benefit from treatment.*Repeat thyroid function tests in 3 months with clinical review*- While repeating tests is a standard approach for **asymptomatic subclinical hypothyroidism**, this patient is clearly **symptomatic** (fatigue, difficulty concentrating, weight gain), indicating a need for more proactive investigation.- Delaying further diagnostic steps, such as **TPO antibody testing**, for 3 months might prolong the patient's distressing symptoms and impact her quality of life and academic performance.*Commence levothyroxine 50 micrograms daily*- Commencing **levothyroxine** immediately for subclinical hypothyroidism with a TSH of 6.8 mU/L is generally not recommended without further investigation, particularly **TPO antibody status**.- Treatment is typically reserved for TSH levels **>10 mU/L** or lower TSH levels (4-10 mU/L) in **symptomatic** patients with confirmed **TPO antibody positivity**, as per guidelines.*Reassure and advise on sleep hygiene measures only*- Although the patient reports poor sleep, her symptoms of **persistent fatigue** and **weight gain**, coupled with the **elevated TSH**, indicate an underlying physiological cause beyond simple lifestyle factors or poor sleep hygiene.- Reassurance alone would ignore the biochemical evidence of **thyroid dysfunction** and the potential for effective treatment to alleviate her symptoms.*Refer to endocrinology for specialist assessment*- Initial investigation and management of **subclinical hypothyroidism**, especially with TSH levels below 10 mU/L, can typically be managed in **primary care**.- Referral to endocrinology is usually reserved for complex cases, **pregnant women**, or when there are diagnostic ambiguities or difficulties in managing treatment.

Question 98: A 59-year-old woman presents with a 5-month history of unintentional weight loss of 8kg and increasing fatigue. She reports early satiety and occasional epigastric discomfort. Physical examination reveals left supraclavicular lymphadenopathy. Abdominal examination shows mild epigastric tenderness. Blood tests show Hb 98 g/L (normal 115-165), MCV 76 fL (normal 80-100), and albumin 32 g/L (normal 35-50). What is the most appropriate next step in management?

A. Prescribe oral iron supplementation and review in 4 weeks
B. Request urgent CT chest, abdomen and pelvis
C. Arrange routine gastroenterology outpatient referral
D. Request coeliac serology and review with results
E. Arrange urgent upper gastrointestinal endoscopy within 2 weeks (Correct Answer)

Explanation: ***Arrange urgent upper gastrointestinal endoscopy within 2 weeks***- The patient presents with **alarm features** for **gastric cancer**, including unintentional weight loss, early satiety, and **iron deficiency anaemia** (low Hb and MCV).- The presence of **Virchow’s node** (left supraclavicular lymphadenopathy) is highly suggestive of metastatic abdominal malignancy, requiring an **Oedophago-Gastro-Duodenoscopy (OGD)** for direct visualization and biopsy.*Prescribe oral iron supplementation and review in 4 weeks*- Treating the **anaemia** without investigating the underlying cause in a patient with **red flag symptoms** is inappropriate and delays cancer diagnosis.- Iron deficiency in an older patient with GI symptoms is considered blood loss from a **malignancy** until proven otherwise.*Request urgent CT chest, abdomen and pelvis*- While CT imaging is essential for **staging** a diagnosed cancer, it is not the primary diagnostic tool for visualizing mucosal lesions in the stomach.- **Endoscopy** remains the gold standard for initial diagnosis as it allows for **histopathological confirmation** via biopsy.*Arrange routine gastroenterology outpatient referral*- A routine referral is unsuitable because the suspected diagnosis is **malignancy**, which requires an **urgent two-week wait (2WW)** pathway to improve outcomes.- Delaying the specialist assessment significantly increases the risk of disease progression and **metastasis**.*Request coeliac serology and review with results*- Although **Coeliac disease** causes malabsorption and weight loss, it does not typically present with **supraclavicular lymphadenopathy** or early satiety.- Investigating for Benign conditions first is a clinical error when the presentation strongly points toward **upper GI malignancy**.

Question 99: A 44-year-old woman presents with a 17-week history of fatigue and generalised pain. She scores 8/10 for pain on average. She reports cognitive difficulties ('brain fog'), poor sleep, and irritable bowel symptoms. Physical examination including joint and neurological assessment is normal. Blood tests including FBC, ESR, CRP, thyroid function, vitamin D, and calcium are normal. She has tried several analgesics without benefit. What is the single most important component of effective management according to current UK guidelines?

A. Explanation of the condition with emphasis on self-management strategies and validating her symptoms (Correct Answer)
B. Trial of amitriptyline 10mg at night with review at 4 weeks
C. Referral to rheumatology for specialist assessment and confirmation of diagnosis
D. Referral to pain clinic for multidisciplinary pain management programme
E. Trial of duloxetine 30mg daily with gradual dose escalation

Explanation: ***Explanation of the condition with emphasis on self-management strategies and validating her symptoms*** - The patient's symptoms (widespread pain, fatigue, cognitive difficulties, poor sleep, IBS) with normal investigations are highly consistent with **fibromyalgia**, a form of **chronic primary pain**. - According to **NICE guidelines (NG193)**, the most important initial step is to build a therapeutic relationship, validate the patient's experience, and educate them on **self-management strategies** like physical activity, sleep hygiene, and stress management. *Trial of amitriptyline 10mg at night with review at 4 weeks* - While **amitriptyline** is a recommended pharmacological option for chronic primary pain, it is typically considered *after* non-pharmacological approaches and comprehensive patient education have been established. - Starting medication without first addressing the patient's understanding of their condition and empowering **self-management** is not the primary or most important initial step. *Referral to rheumatology for specialist assessment and confirmation of diagnosis* - **Fibromyalgia** is primarily a **clinical diagnosis** based on history and examination, often manageable in primary care, especially with normal inflammatory markers (ESR, CRP). - **Specialist referral** is usually reserved for diagnostic uncertainty or suspicion of an underlying inflammatory condition not excluded by initial workup. *Referral to pain clinic for multidisciplinary pain management programme* - **Multidisciplinary pain management programmes** are valuable for complex chronic pain, but they are generally for patients who have not responded to initial primary care interventions and self-management. - This is not the

Question 100: A 54-year-old man presents with a 10-week history of pain in his lower back and hips. The pain is worse in the morning, improves with activity, and is associated with stiffness lasting 90 minutes. He wakes at night with pain and stiffness. NSAIDs provide good relief. Examination shows reduced lumbar spine flexion. Blood tests show ESR 58 mm/hr, CRP 42 mg/L, normal FBC and renal function. X-ray of spine and pelvis is reported as normal. What is the most appropriate next investigation?

A. MRI of sacroiliac joints and spine (Correct Answer)
B. HLA-B27 testing
C. Bone scintigraphy (isotope bone scan)
D. CT of spine and pelvis
E. Repeat X-ray of sacroiliac joints in 3 months

Explanation: ***MRI of sacroiliac joints and spine*** - MRI is the gold standard for diagnosing **non-radiographic axial spondyloarthritis** as it can detect **bone marrow edema** and active inflammation before structural damage appears on X-rays. - This patient presents with classic **inflammatory back pain** (morning stiffness, improvement with exercise, night pain) and elevated inflammatory markers (ESR, CRP), making MRI the most appropriate next step when X-rays are normal. *HLA-B27 testing* - While **HLA-B27** is associated with axial spondyloarthritis, it is not diagnostic on its own, as it is present in approximately 8% of the healthy population and does not substitute for imaging findings. - A negative result does not rule out the disease, and a positive result without imaging evidence of **sacroiliitis** is insufficient for a definitive diagnosis in this clinical context. *Bone scintigraphy (isotope bone scan)* - This modality is highly **non-specific** for axial spondyloarthritis and often shows increased uptake in any area of high bone turnover or general inflammation. - It lacks the sensitivity and anatomical detail required to visualize the specific **bone marrow edema** characteristic of early inflammatory spinal disease. *CT of spine and pelvis* - CT is excellent for visualizing **structural changes** like erosions or ankylosis but is much less sensitive than MRI for detecting early-stage active inflammation and **soft tissue edema**. - It involves significant **ionizing radiation** without providing the diagnostic benefit of identifying active bone marrow edema, which is crucial in early disease. *Repeat X-ray of sacroiliac joints in 3 months* - **Radiographic changes** (secondary to structural damage) can take years to develop on X-rays, making a 3-month follow-up highly likely to be negative and causing an unnecessary delay in treatment. - Current clinical guidelines recommend escalating to **MRI** immediately if clinical suspicion for inflammatory back pain remains high despite a normal initial X-ray.

Question 101: A 48-year-old man presents with a 15-week history of fatigue, night sweats, and 8kg weight loss. Examination reveals non-tender cervical and axillary lymphadenopathy. Blood tests show Hb 102 g/L, WCC 18.5 × 10⁹/L (lymphocytes 14.2 × 10⁹/L), platelets 145 × 10⁹/L, ESR 45 mm/hr, LDH 520 U/L. Blood film shows mature small lymphocytes with smudge cells. What is the most likely diagnosis?

A. Hodgkin lymphoma
B. Chronic lymphocytic leukaemia with Richter transformation
C. Infectious mononucleosis with atypical lymphocytosis
D. Chronic lymphocytic leukaemia (Correct Answer)
E. Non-Hodgkin lymphoma (follicular type)

Explanation: ***Chronic lymphocytic leukaemia*** - The presence of **mature small lymphocytes** and characteristic **smudge cells** (Gumprecht shadows) on the blood film is pathognomonic for **chronic lymphocytic leukaemia (CLL)**. - This patient exhibits a persistent **absolute lymphocytosis** (>5 × 10⁹/L) and clinical features like **lymphadenopathy** and B-symptoms (weight loss, night sweats). *Hodgkin lymphoma* - Typically presents with localized or mediastinal **lymphadenopathy** and lacks the significant **peripheral blood lymphocytosis** seen in this patient. - Diagnosis is confirmed by **lymph node biopsy** identifying **Reed-Sternberg cells**, not by smudge cells on a peripheral film. *Chronic lymphocytic leukaemia with Richter transformation* - **Richter transformation** involves the sudden evolution of CLL into a high-grade **Diffuse Large B-cell Lymphoma**, usually marked by rapidly enlarging nodes and extreme **LDH** elevation. - While this patient has B-symptoms, the blood film still shows **mature small lymphocytes** rather than the large pleomorphic blasts expected in transformation. *Infectious mononucleosis with atypical lymphocytosis* - Infectious mononucleosis typically presents as an **acute** illness (1–2 weeks) with sore throat and fever, whereas this case is **chronic** (15 weeks). - The blood film in mononucleosis shows **atypical lymphocytes** (reactive CD8+ T-cells), which are larger and more irregular than the **smudge cells** seen here. *Non-Hodgkin lymphoma (follicular type)* - Follicular lymphoma usually presents with painless, waxing and waning **lymphadenopathy** but rarely causes significant **peripheral lymphocytosis**. - Diagnosis requires a **node biopsy** showing follicular architecture; it does not produce the characteristic **smudge cells** seen in CLL.

Question 102: A 67-year-old woman presents with a 13-week history of unintentional weight loss (9kg) and progressive fatigue. She has noted increased thirst and urinary frequency. Blood tests show glucose 18.2 mmol/L, HbA1c 72 mmol/mol, C-peptide <50 pmol/L (low), and GAD antibodies strongly positive. She has no personal or family history of autoimmune disease. What is the most appropriate initial management?

A. Commence metformin 500mg twice daily with lifestyle advice and review in 3 months
B. Commence basal-bolus insulin regimen with diabetes specialist nurse support (Correct Answer)
C. Commence once-daily basal insulin with metformin and review in 2 weeks
D. Arrange urgent hospital admission for management of diabetic ketoacidosis
E. Commence GLP-1 receptor agonist with SGLT-2 inhibitor combination

Explanation: ***Commence basal-bolus insulin regimen with diabetes specialist nurse support***- The patient presents with clinical features and lab results highly suggestive of **Latent Autoimmune Diabetes in Adults (LADA)**, including **positive GAD antibodies**, a profoundly low **C-peptide**, and significant weight loss, all indicating severe **insulin deficiency**.- A **basal-bolus insulin regimen** is the most appropriate initial management for patients with absolute or near-absolute insulin deficiency, as it provides both foundational (basal) and mealtime (bolus) insulin coverage, crucial for effective glycemic control and symptom resolution.*Commence metformin 500mg twice daily with lifestyle advice and review in 3 months*- **Metformin** works primarily by reducing hepatic glucose production and improving insulin sensitivity, but it is ineffective in cases of severe **insulin deficiency** as seen here with the low C-peptide and positive GAD antibodies.- Relying on oral agents when there is significant beta-cell destruction would lead to persistent hyperglycemia, worsening symptoms, and a potential risk of **diabetic ketoacidosis (DKA)**.*Commence once-daily basal insulin with metformin and review in 2 weeks*- While **basal insulin** is a necessary component, providing *only* basal insulin would be insufficient to manage the post-prandial glucose excursions in a patient with severe **insulin deficiency** and symptomatic hyperglycemia.- **Metformin** offers little to no benefit in this scenario, as the primary problem is lack of insulin, not insulin resistance. A comprehensive insulin regimen is required.*Arrange urgent hospital admission for management of diabetic ketoacidosis*- Although the patient has significant hyperglycemia (glucose 18.2 mmol/L), there is no specific evidence provided in the stem (e.g., low pH, low bicarbonate, high ketones) to confirm **diabetic ketoacidosis (DKA)**.- Given the stable presentation without overt signs of critical illness (like vomiting or altered mental status), initiating appropriate insulin therapy in an **outpatient setting** with close follow-up and specialist support is generally feasible.*Commence GLP-1 receptor agonist with SGLT-2 inhibitor combination*- **GLP-1 receptor agonists** require some residual beta-cell function to stimulate insulin secretion, which is severely compromised in this patient with a low **C-peptide** and **GAD antibodies**.- **SGLT-2 inhibitors** increase the risk of **euglycemic diabetic ketoacidosis**, especially in patients with **Type 1 diabetes** or **LADA** due to severe insulin deficiency, making them a contraindicated or high-risk option.

Question 103: A 55-year-old woman with chronic kidney disease stage 4 presents with worsening fatigue and generalised bone pain over 8 weeks. Blood tests show corrected calcium 2.15 mmol/L, phosphate 1.95 mmol/L, PTH 185 pg/mL (normal 15-65), ALP 245 U/L, and 25-hydroxyvitamin D 22 nmol/L. Hb 96 g/L, ferritin 45 μg/L. Which intervention should be prioritised first?

A. Commence alfacalcidol and phosphate binders
B. Arrange for erythropoietin-stimulating agent therapy
C. Arrange urgent nephrology review for potential parathyroidectomy
D. Commence colecalciferol supplementation at high dose (Correct Answer)
E. Commence cinacalcet to reduce PTH levels

Explanation: ***Commence colecalciferol supplementation at high dose*** - The patient has **severe native vitamin D deficiency** (25-hydroxyvitamin D 22 nmol/L) which is a primary driver of her **secondary hyperparathyroidism** and bone pain. - Replenishing **25-hydroxyvitamin D stores** with **colecalciferol** is the initial step to naturally lower **PTH** and improve bone mineralisation, often preceding active vitamin D analogues. *Commence alfacalcidol and phosphate binders* - **Alfacalcidol**, an active vitamin D analogue, should generally not be initiated before correcting **severe native vitamin D deficiency** to avoid potential hypercalcemia and ensure proper overall vitamin D metabolism. - While **phosphate binders** are indicated for hyperphosphatemia, addressing the severe vitamin D deficiency is the more immediate and foundational step in managing the overall CKD-MBD picture. *Arrange for erythropoietin-stimulating agent therapy* - The patient's **anemia** (Hb 96 g/L) needs evaluation, but her **ferritin** of 45 μg/L suggests potential **iron deficiency**, which should be treated before considering an **ESA**. - This intervention primarily targets anemia and does not directly address the severe **bone pain** or the underlying **CKD-MBD** pathophysiology. *Arrange urgent nephrology review for potential parathyroidectomy* - **Parathyroidectomy** is a treatment for **refractory secondary hyperparathyroidism** or tertiary hyperparathyroidism, typically after medical management has failed. - Given the severe, uncorrected **vitamin D deficiency**, medical therapy is highly likely to be effective and should be exhausted first, making surgery not an urgent first priority. *Commence cinacalcet to reduce PTH levels* - **Cinacalcet** (a calcimimetic) is typically used for uncontrolled **secondary hyperparathyroidism** in dialysis patients or when PTH remains high despite optimal vitamin D and phosphate management. - It is not a first-line treatment when there is an uncorrected, severe **native vitamin D deficiency**, which needs to be addressed first.

Question 104: A 39-year-old woman presents with an 11-week history of daily fever ranging from 38.5-39.2°C, occurring mainly in the evenings. She also reports arthralgia affecting multiple joints, a transient salmon-pink rash that appears with fever, and sore throat. Blood tests show WCC 16.8 × 10⁹/L (neutrophils 13.2 × 10⁹/L), Hb 108 g/L, platelets 456 × 10⁹/L, ESR 72 mm/hr, CRP 95 mg/L, ferritin 4850 μg/L, and negative ANA and rheumatoid factor. What is the most likely diagnosis?

A. Systemic lupus erythematosus
B. Acute rheumatic fever
C. Kikuchi-Fujimoto disease
D. Adult-onset Still's disease (Correct Answer)
E. Lymphoma with paraneoplastic phenomena

Explanation: ***Adult-onset Still's disease*** - Characterized by the classic triad of **high spiking quotidian fevers**, a **transient salmon-pink rash** that appears with fever, and **polyarthralgia**, all of which are present in this patient along with sore throat. - Key laboratory findings include **markedly elevated ferritin** (often >2500 μg/L), significant **neutrophilic leukocytosis**, elevated inflammatory markers (ESR, CRP), and the absence of **ANA** and **rheumatoid factor**. *Systemic lupus erythematosus* - While it can cause fever and arthralgia, SLE is typically associated with a **positive ANA** and other autoantibodies (e.g., anti-dsDNA), which are negative here. - The rash in SLE is commonly a persistent **malar rash** or discoid rash, differing from the evanescent, salmon-pink rash described. *Acute rheumatic fever* - This condition typically follows a **Group A streptococcal pharyngitis** and presents with **migratory polyarthritis** and elevated inflammatory markers, but not the extreme hyperferritinemia seen. - The characteristic rash is **erythema marginatum**, which has distinct erythematous borders and central clearing, unlike the transient maculopapular rash of Still's disease. *Kikuchi-Fujimoto disease* - Primarily presents with **painful cervical lymphadenopathy** and fever, often without the profound systemic inflammatory response, significant arthralgia, or the distinctive rash of Still's disease. - It does not typically feature the prominent **neutrophilic leukocytosis** or the specific **evanescent salmon-pink maculopapular rash** and extreme hyperferritinemia found in this patient. *Lymphoma with paraneoplastic phenomena* - Can present with **B-symptoms** (fever, weight loss, night sweats) and elevated inflammatory markers, but usually involves **lymphadenopathy** or splenomegaly, and often lacks the specific rash. - While ferritin can be elevated in malignancies, it rarely reaches the **extreme levels** observed (4850 μg/L) with the characteristic **fever-rash synchronization** seen in Adult-onset Still's disease.

Question 105: A 63-year-old man with metastatic lung cancer presents with severe bone pain (8/10) from spinal metastases. He is currently taking morphine sulphate modified release 60mg twice daily and has been using 10mg immediate-release morphine for breakthrough pain approximately 8 times in the past 24 hours. His pain remains poorly controlled. What is the most appropriate adjustment to his analgesia regimen?

A. Add gabapentin 300mg three times daily to current opioid regimen
B. Increase modified-release morphine to 90mg twice daily and breakthrough dose to 15-18mg (Correct Answer)
C. Continue current modified-release dose and increase breakthrough dose to 20mg
D. Switch to transdermal fentanyl patch 50 micrograms/hour with morphine breakthrough
E. Increase modified-release morphine to 80mg twice daily and keep breakthrough dose at 10mg

Explanation: ***Increase modified-release morphine to 90mg twice daily and breakthrough dose to 15-18mg*** - The patient's total daily morphine consumption is **200mg** (120mg background + 80mg breakthrough), indicating that the current background dose is inadequate for his **metastatic bone pain**. - When adjusting doses, the new **daily background dose** should reflect the previous 24-hour total, and the **breakthrough dose** should be **1/6th to 1/10th** of the total daily dose (180mg/6 = 30mg, or 1/10th being 18mg). *Add gabapentin 300mg three times daily to current opioid regimen* - While **gabapentin** is useful for **neuropathic pain**, the immediate priority is to stabilize the **opioid titration** for a patient using frequent breakthrough doses. - Adding an adjuvant doesn't address the primary failure of the current **morphine regimen** to provide baseline analgesia. *Continue current modified-release dose and increase breakthrough dose to 20mg* - Increasing only the **breakthrough dose** fails to address the underlying issue that the **modified-release dose** is too low to maintain steady-state pain control. - Relying on PRN medication for **background pain** leads to a "peak-and-trough" effect, resulting in poor symptom management. *Switch to transdermal fentanyl patch 50 micrograms/hour with morphine breakthrough* - **Fentanyl patches** are generally reserved for patients with **stable pain** requirements or those unable to tolerate oral medications. - Switching an unstable patient to a **transdermal delivery** system makes rapid dose titration difficult and carries a risk of **unpredictable absorption**. *Increase modified-release morphine to 80mg twice daily and keep breakthrough dose at 10mg* - A breakthrough dose should always be **proportionally increased** as the background dose increases to remain effective (typically **1/6th of the total daily dose**). - Keeping the breakthrough at **10mg** while increasing the background provides a dose that is clinically insufficient compared to the patient's demonstrated **daily requirements**.

Question 106: A 46-year-old woman presents with a 20-week history of fatigue and widespread pain affecting her neck, back, and limbs. Pain scores average 7/10 and are present most days. She reports poor sleep quality, waking unrefreshed. She has tried paracetamol and ibuprofen with minimal benefit. Examination shows multiple tender points but no joint swelling or muscle weakness. Blood tests including FBC, ESR, CRP, thyroid function, and vitamin D are all normal. She asks about starting amitriptyline. What is the most appropriate initial dose and dosing regimen?

A. 25mg at night, increasing by 25mg every 2 weeks to target dose of 75mg
B. 50mg at night as a single starting dose given the severity of symptoms
C. 10mg at night, increasing by 10mg weekly to a maximum of 75mg
D. 10mg at night, reviewing after 4 weeks before considering dose increase (Correct Answer)
E. 10mg three times daily, converting to once-daily dosing after 2 weeks

Explanation: ***10mg at night, reviewing after 4 weeks before considering dose increase*** - For **fibromyalgia** and chronic primary pain, **low-dose amitriptyline** (starting at 10mg) is used for its **analgesic** and **sleep-modulating** properties, rather than its antidepressant effect. - A **review after 4 weeks** is crucial to assess clinical response and manage potential side effects, ensuring the patient tolerates the medication before any dose increase. *25mg at night, increasing by 25mg every 2 weeks to target dose of 75mg* - Starting at **25mg** is often too high for initial pain management and significantly increases the risk of **anticholinergic side effects** and **sedation**. - Rapidly escalating to **75mg** is generally unnecessary, as many patients achieve symptom control at much lower doses, typically between **10mg and 30mg**. *50mg at night as a single starting dose given the severity of symptoms* - A starting dose of **50mg** is inappropriate for chronic pain and would likely lead to severe **sedation**, **dizziness**, and **dry mouth**, resulting in poor compliance. - Symptom severity in fibromyalgia does not justify bypassing the "**start low, go slow**" principle essential for titrating tricyclic antidepressants to minimize adverse effects. *10mg at night, increasing by 10mg weekly to a maximum of 75mg* - While the **10mg starting dose** is correct, a **weekly increase** is generally too aggressive and does not allow enough time to assess the full therapeutic benefit and tolerability of each dose level. - Routine titration up to **75mg** is not standard practice for fibromyalgia; the goal is the **lowest effective dose** to minimize side effects, which is often much lower. *10mg three times daily, converting to once-daily dosing after 2 weeks* - **Three times daily dosing** is not recommended for amitriptyline in this context due to its significant sedative properties, which would cause excessive daytime **somnolence**. - **Once-daily dosing at night** is preferred to utilize the medication's sedative effects to improve **sleep quality**, a core symptom of fibromyalgia, without causing daytime impairment.

Question 107: A 72-year-old man presents with a 9-week history of fever (temperatures documented between 38.2-38.9°C), weight loss of 7kg, and progressive fatigue. He has a history of aortic valve replacement 3 years ago (mechanical valve) and is on warfarin. Three sets of blood cultures taken when febrile have shown no growth after 5 days. Echocardiogram shows the prosthetic valve functioning normally with no vegetations seen. CRP is 78 mg/L, ESR 62 mm/hr. What is the most appropriate next step in investigation?

A. Request extended culture of blood samples for fastidious organisms
B. Arrange urgent transoesophageal echocardiogram (Correct Answer)
C. Arrange whole-body FDG-PET-CT scanning
D. Commence empirical antibiotic therapy for culture-negative endocarditis
E. Arrange CT chest, abdomen and pelvis with contrast

Explanation: ***Arrange urgent transoesophageal echocardiogram*** - A **transoesophageal echocardiogram (TOE)** is the investigation of choice for **prosthetic valve endocarditis (PVE)** because it has significantly higher sensitivity (90-95%) compared to transthoracic echocardiography (TTE), which is often limited by **acoustic shadowing** from the mechanical valve. - Given the patient's **fever of unknown origin (FUO)** and high-risk prosthetic valve history, a negative TTE does not rule out infection, and TOE is necessary to detect **vegetations, abscesses, or dehiscence**. *Request extended culture of blood samples for fastidious organisms* - While **culture-negative endocarditis** can be caused by fastidious **HACEK organisms** or Coxiella, modern blood culture systems usually detect most organisms within 5 days. - This step should happen in parallel with imaging but does not take precedence over a **TOE** to visualize the prosthetic valve anatomy and potential damage. *Arrange whole-body FDG-PET-CT scanning* - **FDG-PET/CT** is increasingly used in the **Modified Duke Criteria** for prosthetic valves, but it is typically reserved for cases where TOE remains inconclusive or to identify metastatic infection. - It is not the first-line imaging modality when **infective endocarditis** is clinically suspected, as TOE provides superior anatomical detail and immediate results. *Commence empirical antibiotic therapy for culture-negative endocarditis* - Empirical antibiotics should be deferred until essential diagnostic workup, including **TOE**, is performed to avoid suppressing culture yields or masking diagnostic findings. - Starting treatment without a confirmed diagnosis or further imaging is premature in a **hemodynamically stable** patient with a complex clinical presentation. *Arrange CT chest, abdomen and pelvis with contrast* - A **CT CAP** is often a standard part of a **pyrexia of unknown origin (PUO)** workup to look for occult malignancy or abscesses. - However, in a patient with a **mechanical heart valve**, the clinical suspicion for **endocarditis** remains the highest priority, making TOE the mandatory next structural investigation.

Question 108: A 35-year-old woman presents with a 14-week history of profound fatigue, low-grade fever, and a 6kg weight loss. She reports polyuria and polydipsia developing over the past 3 weeks. She appears tanned despite no recent sun exposure. Blood tests show Na+ 129 mmol/L, K+ 5.8 mmol/L, urea 8.2 mmol/L, glucose 2.8 mmol/L, and random cortisol 85 nmol/L. Which investigation is most important to arrange urgently?

A. Magnetic resonance imaging of pituitary gland
B. CT chest, abdomen and pelvis to exclude malignancy
C. Short Synacthen stimulation test (Correct Answer)
D. 21-hydroxylase antibodies and adrenal antibodies
E. Insulin tolerance test to assess HPA axis

Explanation: ***Short Synacthen stimulation test*** - The patient's presentation with profound fatigue, weight loss, **hyperpigmentation** (tanned appearance), **hyponatremia**, **hyperkalemia**, **hypoglycemia**, and a low random **cortisol** (85 nmol/L) is highly suggestive of **primary adrenal insufficiency** (Addison's disease). The Short Synacthen test is the gold standard for confirming this diagnosis. - This test directly assesses the **adrenal gland's ability** to produce cortisol in response to synthetic **ACTH**, providing immediate diagnostic clarity for urgent management. *Magnetic resonance imaging of pituitary gland* - MRI of the pituitary gland is primarily used to investigate **secondary adrenal insufficiency**, where the pathology lies in the pituitary or hypothalamus, leading to **low ACTH** production. - The patient's **hyperpigmentation** and **hyperkalemia** strongly indicate **primary adrenal insufficiency**, where ACTH levels are high due to adrenal failure, making pituitary imaging a less urgent initial step. *CT chest, abdomen and pelvis to exclude malignancy* - While conditions like **tuberculosis** or **metastatic cancer** can cause adrenal destruction, confirming the **functional deficiency** of the adrenal gland with a stimulation test is the immediate priority. - Imaging to find the underlying etiology is a secondary step after biochemical confirmation of adrenal insufficiency, and it is not as urgent as confirming the diagnosis itself. *21-hydroxylase antibodies and adrenal antibodies* - These tests are valuable for determining the **etiology** of primary adrenal insufficiency, specifically identifying an **autoimmune cause**. - However, they do not establish the diagnosis of adrenal insufficiency itself; the functional status of the adrenal gland must first be confirmed with a **dynamic stimulation test**. *Insulin tolerance test to assess HPA axis* - The **Insulin Tolerance Test (ITT)** induces hypoglycemia to assess the **hypothalamic-pituitary-adrenal (HPA) axis** and is contraindicated in this patient. - The patient already has symptomatic **hypoglycemia (glucose 2.8 mmol/L)**, making the ITT dangerous and risking severe adverse events like seizures or coma.

Question 109: According to current UK guidance on the management of chronic pain in primary care, which of the following is the recommended first-line pharmacological approach for chronic primary pain?

A. Paracetamol with or without a weak opioid such as codeine
B. A tricyclic antidepressant such as amitriptyline (Correct Answer)
C. A selective serotonin reuptake inhibitor such as duloxetine
D. A non-steroidal anti-inflammatory drug with gastric protection
E. Gabapentin or pregabalin titrated to therapeutic dose

Explanation: ***A tricyclic antidepressant such as amitriptyline*** - According to **NICE NG193** guidelines, antidepressants like **amitriptyline** are recommended for the management of **chronic primary pain** (e.g., fibromyalgia) in adults. - This pharmacological intervention should only be considered if non-pharmacological therapies, such as **exercise programmes** or **psychological therapies**, have been discussed. *Paracetamol with or without a weak opioid such as codeine* - Current guidance specifically recommends **against** the use of **paracetamol** or **opioids** for chronic primary pain due to lack of evidence for efficacy and risk of harm. - **Opioids** are associated with serious long-term risks, including **dependence** and **opioid-induced hyperalgesia**. *A selective serotonin reuptake inhibitor such as duloxetine* - While some antidepressants are recommended, **Duloxetine** is technically a **Serotonin-Noradrenaline Reuptake Inhibitor (SNRI)**, not an SSRI, making this option pharmacologically inaccurate. - While **SNRIs** can be used for pain, the primary choice among antidepressants listed in guidelines often highlights **tricyclics** or specific SNRIs when appropriate. *A non-steroidal anti-inflammatory drug with gastric protection* - **NICE** guidelines recommend **against** the initiation of **NSAIDs** for chronic primary pain because there is little evidence they improve quality of life or pain levels long-term. - Their use is generally restricted to **chronic secondary pain** conditions where there is an underlying inflammatory or structural cause. *Gabapentin or pregabalin titrated to therapeutic dose* - These **anti-epileptics** are recommended for **neuropathic pain**, but the latest guidance specifically advises **against** their use for chronic primary pain. - There is an increased concern regarding the risk of **misuse**, **dependence**, and lack of long-term benefit for non-neuropathic primary pain syndromes.

Question 110: A 50-year-old woman presents with a 16-week history of progressive fatigue and generalised weakness. She reports feeling cold despite warm weather and has gained 4kg in weight. She has a past history of type 1 diabetes mellitus. Examination reveals delayed relaxation of ankle reflexes and dry skin. Blood tests show TSH 42 mIU/L (0.5-5.0), free T4 8 pmol/L (10-22), Hb 108 g/L, MCV 98 fL, and fasting glucose 8.2 mmol/L. Which additional autoimmune condition should be specifically screened for given this presentation?

A. Primary biliary cholangitis
B. Sjögren's syndrome
C. Coeliac disease
D. Addison's disease (Correct Answer)
E. Pernicious anaemia

Explanation: ***Addison's disease*** - This patient likely has **Autoimmune Polyglandular Syndrome type 2 (APS-2)**, characterized by the triad of **Type 1 Diabetes Mellitus**, autoimmune thyroid disease (hypothyroidism), and **Addison's disease**. - Screening for **primary adrenal insufficiency** is critical because starting thyroxine in an undiagnosed Addison's patient can precipitate a life-threatening **adrenal crisis** by increasing metabolic cortisol clearance. *Coeliac disease* - While associated with **Type 1 Diabetes**, it typically presents with gastrointestinal symptoms, malabsorption, or iron deficiency rather than the classic APS-2 triad. - Primary hypothyroidism and fatigue in this context are more directly linked to the autoimmune endocrine cluster. *Pernicious anaemia* - This can cause **macrocytic anaemia** and fatigue (as seen with this patient's MCV of 98 fL), but it is not a defining component of the core **Schmidt’s syndrome (APS-2)** triad. - The priority screening in polyendocrine failure remains the adrenal axis to avoid clinical catastrophe during treatment of other glands. *Primary biliary cholangitis* - This is an autoimmune liver disease causing fatigue and pruritus, but it is not part of the common **autoimmune polyendocrine** clusters. - It would typically show an elevated **alkaline phosphatase (ALP)** and is associated with anti-mitochondrial antibodies, which are not suggested here. *Sjögren's syndrome* - While it causes fatigue and dry skin (though usually dry eyes/mouth), it is a **connective tissue disorder** rather than an organ-specific endocrine autoimmune disease. - It does not carry the same risk of acute medical collapse as undiagnosed adrenal insufficiency in a patient with polyendocrinopathy.

Question 111: A 41-year-old man presents with a 12-week history of fatigue, night sweats, and a 5kg weight loss. He reports intermittent fevers but has not documented his temperature. He travelled to India 6 months ago to visit family. Examination reveals palpable cervical lymphadenopathy measuring 2cm. Blood tests show Hb 118 g/L, WCC 9.8 × 10⁹/L (lymphocytes 6.2 × 10⁹/L), ESR 48 mm/hr, CRP 35 mg/L, normal liver and renal function. Chest X-ray shows bilateral hilar lymphadenopathy. What is the single most appropriate investigation to establish the diagnosis?

A. Mantoux test and interferon-gamma release assay
B. CT chest with contrast and CT-guided lung biopsy
C. Excision biopsy of cervical lymph node (Correct Answer)
D. Bone marrow aspirate and trephine biopsy
E. Serum ACE level and 24-hour urinary calcium

Explanation: ***Excision biopsy of cervical lymph node***- The patient presents with **B symptoms** (fatigue, night sweats, weight loss, fevers), **palpable cervical lymphadenopathy**, and **bilateral hilar lymphadenopathy** on CXR, with a travel history to **India**.- An **excision biopsy** is the **gold standard** for investigating accessible peripheral lymphadenopathy, providing sufficient tissue for **histological examination**, **immunohistochemistry**, and **microbiological cultures** (e.g., for TB) to definitively diagnose conditions like **lymphoma**, **tuberculosis**, or **sarcoidosis**.*Mantoux test and interferon-gamma release assay*- These tests screen for **tuberculosis infection** (latent or active) but cannot differentiate it from other serious conditions like **lymphoma** or **sarcoidosis**, which are also in the differential given the B symptoms and lymphadenopathy.- A positive result does not provide **histological confirmation**, which is essential for a definitive diagnosis and treatment planning in this clinical scenario.*CT chest with contrast and CT-guided lung biopsy*- While **bilateral hilar lymphadenopathy** is evident, performing a **CT-guided lung biopsy** is a more **invasive procedure** with higher risks (e.g., **pneumothorax**) compared to biopsying an accessible peripheral lymph node.- This investigation is generally reserved for situations where peripheral nodes are not accessible or a specific lung lesion needs to be targeted, which is not the case here given the 2cm cervical node.*Bone marrow aspirate and trephine biopsy*- This investigation is primarily used for **staging hematological malignancies** (e.g., lymphoma) or diagnosing **disseminated infections**, rather than as a primary diagnostic step for palpable superficial lymphadenopathy.- While it could show involvement in **lymphoma** or **disseminated TB**, it is usually not the first-line investigation when a more accessible lymph node is available for direct sampling.*Serum ACE level and 24-hour urinary calcium*- **Serum ACE** is a non-specific marker for **sarcoidosis** with variable sensitivity and specificity, and it cannot rule out other critical diagnoses like **lymphoma** or **tuberculosis**.- Elevated **urinary calcium** can support sarcoidosis but, like ACE, these biochemical tests do not provide the **definitive tissue diagnosis** required to establish the underlying cause of the patient's symptoms and lymphadenopathy.

Question 112: A 58-year-old woman presents with a 10-week history of unintentional weight loss of 8kg. She reports decreased appetite but denies dysphagia, abdominal pain, or altered bowel habit. She has no past medical history and takes no regular medications. Physical examination is unremarkable. Initial blood tests show Hb 132 g/L, WCC 7.2 × 10⁹/L, platelets 245 × 10⁹/L, ESR 18 mm/hr, CRP 6 mg/L, normal renal and liver function, normal thyroid function, and HbA1c 38 mmol/mol. What is the most appropriate next step in management?

A. Arrange urgent upper and lower gastrointestinal endoscopy within 2 weeks
B. Arrange CT chest, abdomen and pelvis with contrast (Correct Answer)
C. Repeat blood tests in 4 weeks and review weight trajectory
D. Arrange psychiatric assessment for possible depression or eating disorder
E. Request tumour markers including CA-19-9, CEA, and CA-125

Explanation: ***Arrange CT chest, abdomen and pelvis with contrast*** - In a 58-year-old woman with significant **unexplained weight loss** (8kg in 10 weeks) and decreased appetite, a **CT chest, abdomen, and pelvis (CT CAP)** is the most appropriate first-line investigation to screen for occult malignancy. - This comprehensive imaging allows for the detection of potential primary tumors or metastases in various common sites (e.g., lung, pancreas, kidney, ovary) when initial blood tests are normal and localizing symptoms are absent. *Arrange urgent upper and lower gastrointestinal endoscopy within 2 weeks* - These invasive procedures are typically indicated for patients with specific **gastrointestinal symptoms** such as dysphagia, abdominal pain, altered bowel habit, or iron-deficiency anemia. - In the absence of such localized symptoms, a **cross-sectional imaging study** like CT CAP provides a broader and more efficient initial screening for systemic causes of weight loss. *Repeat blood tests in 4 weeks and review weight trajectory* - Delaying further investigation of **significant unintentional weight loss** in an older adult is unsafe and may lead to a missed or delayed diagnosis of a serious underlying condition, such as malignancy. - Since initial comprehensive blood tests were unremarkable and did not reveal a cause, repeating them without further advanced imaging is an inadequate approach when **urgent cancer screening** is warranted. *Arrange psychiatric assessment for possible depression or eating disorder* - While psychiatric conditions can cause weight loss, in a patient of this age with significant unexplained weight loss, an **organic cause**, particularly malignancy, must be thoroughly investigated and ruled out first. - Psychiatric diagnoses should generally be considered **diagnoses of exclusion** after a comprehensive medical workup has failed to identify a physical etiology, especially in a patient with no prior psychiatric history. *Request tumour markers including CA-19-9, CEA, and CA-125* - **Tumor markers** generally lack the sensitivity and specificity for routine cancer screening in individuals with undifferentiated symptoms and can result in false positives or negatives. - Their primary utility lies in monitoring response to treatment, detecting recurrence in known cancers, or for specific diagnostic situations, not as a first-line investigation for **unexplained weight loss**.

Question 113: Which of the following statements best describes the concept of 'diagnostic safety-netting' when managing patients with undifferentiated symptoms in primary care?

A. Providing clear written information about red flag symptoms and arranging definite follow-up with specific review criteria (Correct Answer)
B. Arranging multiple baseline investigations to exclude serious pathology before discharge
C. Referring all patients with unexplained symptoms to secondary care for specialist assessment
D. Prescribing empirical treatment and reviewing response after 4 weeks
E. Documenting in notes that the patient should return if symptoms worsen

Explanation: ***Providing clear written information about red flag symptoms and arranging definite follow-up with specific review criteria*** - **Diagnostic safety-netting** is a core clinical skill used to manage **diagnostic uncertainty** by empowering patients with specific **red flag symptoms** that require urgent re-evaluation. - It involves a structured plan that includes **time-based** or **symptom-based** follow-up, ensuring that serious pathology is not missed if symptoms evolve. *Arranging multiple baseline investigations to exclude serious pathology before discharge* - This approach may lead to **over-investigation**, unnecessary patient anxiety, and increased healthcare costs without clinical justification. - **Safety-netting** is designed specifically for cases where immediate investigation is not yet warranted but monitoring is essential. *Referring all patients with unexplained symptoms to secondary care for specialist assessment* - Routine **specialist referral** for all undifferentiated symptoms is unsustainable and often unnecessary, as many symptoms resolve spontaneously in **primary care**. - Primary care clinicians use **watchful waiting** alongside safety-netting to differentiate between minor illness and significant pathology. *Prescribing empirical treatment and reviewing response after 4 weeks* - **Empirical treatment** can mask worsening symptoms and potentially delay the diagnosis of a more serious underlying condition. - A fixed **4-week review** may be too late if the patient experiences a rapid decline or develops acute **red flag** indicators. *Documenting in notes that the patient should return if symptoms worsen* - Simply telling a patient to return "if symptoms worsen" is considered **vague safety-netting** and is often inadequate for patient safety. - Effective safety-netting must be **specific** regarding what "worsening" looks like and provide a definitive **follow-up mechanism**.

Question 114: A 64-year-old woman presents with a 10-week history of fatigue and progressive shortness of breath on exertion. She has lost 7kg in weight. Examination reveals pale conjunctivae and a palpable abdominal mass in the right upper quadrant. Blood tests show: Hb 78 g/L, MCV 72 fL, ferritin 8 μg/L. Faecal immunochemical test (FIT) is 250 μg Hb/g faeces. What is the most appropriate management pathway?

A. Arrange urgent direct access upper GI endoscopy within 2 weeks
B. Refer urgently via 2-week-wait pathway for suspected lower GI cancer (Correct Answer)
C. Commence oral iron supplementation and repeat FBC in 4 weeks
D. Arrange CT abdomen and pelvis with contrast within 2 weeks
E. Refer to gastroenterology for colonoscopy within 6 weeks

Explanation: ***Refer urgently via 2-week-wait pathway for suspected lower GI cancer*** - This patient presents with multiple red-flag features for **colorectal cancer**, including severe **microcytic iron deficiency anaemia**, significant **unexplained weight loss**, a highly **positive Faecal Immunochemical Test (FIT)**, and a **palpable abdominal mass**. - According to **NICE guidelines (NG12)**, these findings necessitate an urgent **two-week-wait (2WW)** referral for suspected lower gastrointestinal cancer to ensure prompt diagnosis and management. *Arrange urgent direct access upper GI endoscopy within 2 weeks* - While **iron deficiency anaemia** can be caused by upper GI bleeding, the **palpable abdominal mass** in the right upper quadrant and the highly **positive FIT test** strongly indicate a **lower GI source** of bleeding or pathology. - An upper GI endoscopy would not investigate the likely source of pathology in the lower gastrointestinal tract. *Commence oral iron supplementation and repeat FBC in 4 weeks* - Commencing **oral iron** without investigating the underlying cause of severe **iron deficiency anaemia** in an older patient with multiple red flags for malignancy is a dangerous delay in diagnosis. - This approach is inappropriate as it overlooks the high likelihood of serious pathology, such as **gastrointestinal cancer**, which requires urgent evaluation. *Arrange CT abdomen and pelvis with contrast within 2 weeks* - While a **CT scan** is valuable for staging confirmed malignancies, it is typically not the initial diagnostic investigation in primary care for suspected **colorectal cancer**. - The standard pathway involves specialist assessment via a **2-week-wait referral**, which will usually lead to **colonoscopy** as the primary diagnostic tool for lower GI pathology, followed by imaging if cancer is confirmed. *Refer to gastroenterology for colonoscopy within 6 weeks* - A 6-week timeframe for a colonoscopy referral is considered routine or semi-urgent, which is unacceptably long for a patient with multiple high-risk features for **colorectal cancer**. - The presence of severe anaemia, weight loss, an abdominal mass, and a positive FIT mandates an **urgent 2-week-wait referral** to expedite diagnosis and prevent potential adverse outcomes from delayed treatment.

Question 115: A 42-year-old man presents with a 9-week history of fever up to 38.6°C, night sweats, and 8kg weight loss. He reports recent travel to Spain. Examination reveals hepatosplenomegaly. Blood tests show pancytopenia with Hb 102 g/L, WCC 3.1 × 10⁹/L, platelets 98 × 10⁹/L. Liver enzymes are mildly elevated. Blood cultures are negative. What is the most appropriate diagnostic test?

A. Bone marrow aspirate with culture
B. Abdominal CT with contrast
C. Liver biopsy
D. Serology for Brucella, Leishmania, and Q fever (Correct Answer)
E. HIV test with CD4 count

Explanation: ***Serology for Brucella, Leishmania, and Q fever*** - This patient presents with a **fever of unknown origin (FUO)**, **hepatosplenomegaly**, and **pancytopenia** after traveling to Spain (a Mediterranean country), which are hallmark features of **Visceral Leishmaniasis (Kala-azar)** and **Brucellosis**, both endemic to the region. - **Serology** is the most appropriate initial, non-invasive diagnostic step to screen for these endemic zoonotic infections when standard blood cultures are negative. *Bone marrow aspirate with culture* - While bone marrow examination can be diagnostic for **Leishmaniasis** (showing **amastigotes** in macrophages) or **Brucellosis** (positive culture), it is an invasive procedure. - It is typically reserved for cases where non-invasive tests are inconclusive or if a hematological malignancy is strongly suspected, and not usually the first-line investigation for a suspected travel-related infection. *Abdominal CT with contrast* - This imaging modality would confirm **hepatosplenomegaly** and assess for lymphadenopathy or abscesses, but it does not provide a **microbiological diagnosis**. - It is useful for anatomical assessment but does not identify the etiology of the **pancytopenia** and systemic symptoms in this context. *Liver biopsy* - This is a highly invasive procedure that might reveal **granulomas** (in Brucella or Q fever) but is rarely the first step in diagnosing travel-related systemic infections. - The risk of complications like bleeding is elevated in this patient due to **thrombocytopenia** (platelets 98 x 10⁹/L). *HIV test with CD4 count* - While **HIV** should be considered in any patient presenting with **FUO** and weight loss, it does not specifically account for the recent travel to Spain or the pronounced **hepatosplenomegaly** and pancytopenia as directly as endemic zoonoses. - It is a standard screening test but is less likely to yield the primary diagnosis of the acute travel-related illness described here compared to targeted serology for suspected endemic infections.

Question 116: A 69-year-old man with osteoarthritis presents for review of his pain management. He takes paracetamol 1g QDS and ibuprofen 400mg TDS but continues to have significant pain (7/10) affecting his activities of daily living. He has a history of ischaemic heart disease with previous myocardial infarction 3 years ago. eGFR is 52 ml/min. What is the most appropriate modification to his analgesic regimen?

A. Continue current regimen and add codeine 30mg QDS
B. Stop ibuprofen and continue paracetamol alone (Correct Answer)
C. Continue paracetamol and add topical NSAIDs
D. Stop all current medications and start tramadol 50mg QDS
E. Continue current regimen and add pregabalin 75mg BD

Explanation: ***Stop ibuprofen and continue paracetamol alone*** - Oral **NSAIDs** like ibuprofen are contraindicated in patients with **ischaemic heart disease** (post-MI) due to a significantly increased risk of further **cardiovascular events**. - This patient also has **chronic kidney disease (Stage 3a)** with an eGFR of 52 ml/min; NSAIDs can further deteriorate **renal function** by inhibiting prostaglandin-mediated afferent arteriolar vasodilation. *Continue current regimen and add codeine 30mg QDS* - Adding an opioid while maintaining oral ibuprofen is unsafe due to the pre-existing **cardiovascular** and **renal contraindications**. - Opioids should only be considered as a step-up therapy after potentially **harmful medications** have been removed from the regimen. *Continue paracetamol and add topical NSAIDs* - While **topical NSAIDs** are often preferred over oral NSAIDs due to lower systemic absorption, the priority in this clinical scenario is the immediate **cessation of the contraindicated oral ibuprofen**. - Use of topical NSAIDs may be an appropriate next step, but this option fails to explicitly address the removal of the high-risk **oral NSAID**. *Stop all current medications and start tramadol 50mg QDS* - Paracetamol is generally safe and should be continued as **first-line therapy**; there is no medical indication to stop it in this patient. - Starting **tramadol** (a strong opioid/SNRI-like analgesic) carries risks of **delirium**, falls, and addiction, especially in elderly patients, and should not be the first modification. *Continue current regimen and add pregabalin 75mg BD* - **Pregabalin** is indicated for **neuropathic pain**, but there is no evidence here of nerve involvement in the patient's osteoarthritis. - Continuing the current regimen ignores the hazardous **ibuprofen use** in a patient with a history of **myocardial infarction**.

Question 117: A 37-year-old woman presents with a 5-week history of daily fever peaking at 39.2°C, occurring mainly in the late afternoon. She reports a salmon-pink rash that appears with the fever then disappears. She has severe arthralgia affecting wrists, knees, and ankles. Blood tests show: WCC 16.5 × 10⁹/L (neutrophils 13.2), CRP 145 mg/L, ferritin 4800 μg/L. ANA, RF, and blood cultures are negative. What is the most likely diagnosis?

A. Systemic lupus erythematosus
B. Adult-onset Still's disease (Correct Answer)
C. Infectious mononucleosis
D. Acute rheumatic fever
E. Septic arthritis with bacteraemia

Explanation: ***Adult-onset Still's disease***- This patient presents with the classic triad of **Adult-onset Still's disease (AOSD)**: a **quotidian fever** peaking in the late afternoon, an **evanescent salmon-pink rash** that appears with the fever spikes, and polyarthralgia affecting wrists, knees, and ankles.- Laboratory findings of **markedly elevated ferritin** (4800 μg/L, typically >1000 ng/mL), **neutrophilic leukocytosis** (WCC 16.5 × 10⁹/L, neutrophils 13.2), and negative **ANA** and **RF** are highly characteristic diagnostic markers.*Systemic lupus erythematosus*- While **Systemic lupus erythematosus (SLE)** can cause fever, arthralgia, and rash, it is usually associated with **positive ANA** and often anti-dsDNA antibodies, which are absent here.- The **evanescent** nature of this rash and the extreme level of **hyperferritinemia** are much more suggestive of AOSD than lupus.*Infectious mononucleosis*- **Infectious mononucleosis** typically presents with **lymphadenopathy**, **sore throat**, and **atypical lymphocytosis** rather than the neutrophilia observed.- The fever and rash in EBV infection do not follow the specific **quotidian pattern** or associated with such high inflammatory markers, particularly ferritin, seen in this case.*Acute rheumatic fever*- **Acute rheumatic fever** typically presents following a **Group A streptococcal pharyngitis** and is characterized by migratory polyarthritis and **erythema marginatum**, a different rash.- It is diagnosed using the **Jones criteria**, and it would not account for the extreme **ferritin** elevation or the specific salmon-pink evanescent rash described.*Septic arthritis with bacteraemia*- **Septic arthritis** usually presents as an acute **monoarthritis** with high-grade fever and would typically yield **positive blood cultures** if bacteraemia is present.- This patient's **symmetrical arthralgia** and negative blood cultures, combined with the specific multisystem nature of the symptoms including the rash and extreme hyperferritinemia, point away from a primary bacterial infection.

Question 118: A 53-year-old woman presents with a 7-week history of profound fatigue, difficulty concentrating, and feeling cold. She has gained 3kg despite reduced appetite. Blood tests show: TSH 0.05 mU/L (normal 0.5-5.0), free T4 32 pmol/L (normal 10-22), free T3 8.2 pmol/L (normal 3.5-6.5). Heart rate is 96 bpm regular. What is the most likely explanation for this clinical picture?

A. Graves' disease with atypical presentation
B. TSH-secreting pituitary adenoma (Correct Answer)
C. Subclinical hyperthyroidism
D. Thyroid hormone resistance syndrome
E. Assay interference causing spurious results

Explanation: ***TSH-secreting pituitary adenoma*** - This diagnosis explains the paradoxical presentation of **biochemical hyperthyroidism** (elevated **free T4** and **free T3**) alongside symptoms traditionally associated with a **hypothyroid state** (fatigue, cold, weight gain), while also having a slightly elevated heart rate. - Although TSH-secreting adenomas typically show inappropriately normal or elevated TSH, the autonomous secretion of TSH drives thyroid hormone production. In rare cases, TSH values can fluctuate or be difficult to interpret, even appearing low in certain contexts of secondary hyperthyroidism. *Graves' disease with atypical presentation* - Graves' disease would explain the **suppressed TSH** and elevated thyroid hormones (primary hyperthyroidism). - However, the patient's predominant symptoms of **cold intolerance**, **weight gain**, and profound fatigue are highly atypical, as classic Graves' presents with hypermetabolic symptoms like heat intolerance and weight loss. *Subclinical hyperthyroidism* - Subclinical hyperthyroidism is characterized by a **suppressed TSH** but **normal free T4 and free T3 levels**. - This patient has significantly **elevated free T4 and free T3**, which rules out subclinical hyperthyroidism. *Thyroid hormone resistance syndrome* - This syndrome presents with elevated T3 and T4 but an **inappropriately normal or elevated TSH**, due to peripheral tissue resistance to thyroid hormones. - The patient's **suppressed TSH** (0.05 mU/L) does not fit the diagnostic criteria for thyroid hormone resistance syndrome. *Assay interference causing spurious results* - **Assay interference**, such as from **biotin supplementation**, can cause misleading results (e.g., falsely low TSH, falsely high free T4/T3) which could explain the biochemical-clinical discordance. - However, a **TSH-secreting pituitary adenoma** offers a direct pathophysiological explanation for sustained secondary hyperthyroidism that encompasses both hormonal elevations and varied clinical manifestations.

Question 119: A 60-year-old man with COPD presents with a 6-week history of worsening fatigue, reduced appetite, and 5kg weight loss. He reports increasing breathlessness but no chest pain. He is a current smoker (40 pack-years). Examination reveals reduced breath sounds and dullness to percussion at the right base. Oxygen saturations are 93% on air. What is the single most important investigation to arrange?

A. Chest X-ray (Correct Answer)
B. CT pulmonary angiography
C. Spirometry
D. Full blood count and CRP
E. Sputum culture

Explanation: ***Chest X-ray***- A **chest X-ray** is the essential first-line investigation in any patient over 40 with a significant **smoking history** presenting with **red flag symptoms** like weight loss, fatigue, and persistent breathlessness, strongly suggesting potential malignancy.- It is highly effective for identifying structural abnormalities such as a **lung mass**, **pleural effusion**, or **atelectasis**, directly addressing the physical findings of **dullness to percussion** and reduced breath sounds at the right base.*CT pulmonary angiography*- **CT pulmonary angiography (CTPA)** is the gold standard for diagnosing **pulmonary embolism**, but the patient's presentation (insidious onset, constitutional symptoms) is not typical for an acute PE.- The absence of classic PE symptoms like **acute pleuritic chest pain** or **hemoptysis**, along with the presence of **red flag symptoms** for malignancy, makes a general structural assessment (CXR) more important initially.*Spirometry*- While useful for diagnosing and monitoring **COPD**, spirometry cannot identify the underlying cause of **constitutional symptoms** like weight loss or localized findings such as **dullness to percussion**.- Performing spirometry would delay the urgent investigation needed for a suspected **malignancy** or **pleural effusion** in a high-risk patient with new, concerning symptoms.*Full blood count and CRP*- **Full blood count (FBC)** and **C-reactive protein (CRP)** are non-specific tests that can indicate **inflammation** or **anemia** but cannot identify the specific structural pathology suggested by the examination findings.- Relying on these tests would delay crucial **imaging** to investigate the underlying cause of **dullness to percussion** and **weight loss**, which could be a malignancy.*Sputum culture*- **Sputum culture** is primarily indicated for diagnosing **bacterial infections** like pneumonia or tuberculosis, especially with purulent sputum or fever.- The patient's **insidious weight loss** and localized **dullness** suggest a more serious underlying structural issue than a simple infection, making imaging a more appropriate initial step to rule out malignancy or significant effusion.

Question 120: A 44-year-old woman presents with a 12-week history of severe fatigue and widespread pain affecting her neck, back, arms, and legs. She describes the pain as constant, aching, and rated 7/10 in severity. She reports poor sleep, waking frequently, and feeling unrefreshed. Examination reveals tenderness over multiple areas but no joint swelling or objective weakness. Blood tests including FBC, CRP, ESR, TFTs, and calcium are all normal. Using the WHO analgesic ladder, what is the most appropriate initial management approach?

A. Paracetamol 1g QDS regularly and commence amitriptyline 10mg nocte (Correct Answer)
B. Codeine 30-60mg QDS and refer to pain clinic
C. Ibuprofen 400mg TDS with omeprazole cover
D. Tramadol 50mg QDS and arrange urgent rheumatology referral
E. Morphine sulfate modified release 10mg BD and prescribe laxatives

Explanation: ***Paracetamol 1g QDS regularly and commence amitriptyline 10mg nocte*** - The patient presents with **fibromyalgia**, suggested by chronic widespread pain, fatigue, poor sleep, and **normal inflammatory markers** (ESR/CRP). - **Amitriptyline** is a first-line pharmacological treatment that addresses both the **central sensitization** of pain and the **non-restorative sleep** patterns characteristic of the condition. *Codeine 30-60mg QDS and refer to pain clinic* - **Codeine** is a weak opioid; clinical guidelines generally **recommend against** the use of opioids for fibromyalgia due to lack of long-term efficacy and risk of addiction. - Referral to a pain clinic is usually reserved for complex cases that have failed **primary care management** and multidisciplinary approaches. *Ibuprofen 400mg TDS with omeprazole cover* - **NSAIDs** like ibuprofen are typically ineffective for fibromyalgia as the condition is characterized by **central pain processing** issues rather than peripheral inflammation. - While useful for inflammatory arthritis, they do not address the **sleep disturbances** or fatigue associated with this patient's presentation. *Tramadol 50mg QDS and arrange urgent rheumatology referral* - **Tramadol** has some evidence in fibromyalgia but is not the preferred initial step due to potential side effects and **dependency risks**. - An **urgent rheumatology referral** is not indicated as there are no "red flags" or objective signs of inflammatory systemic disease (e.g., joint swelling, abnormal labs). *Morphine sulfate modified release 10mg BD and prescribe laxatives* - **Strong opioids** like morphine are explicitly discouraged for chronic primary pain conditions like fibromyalgia because they can cause **opioid-induced hyperalgesia**. - NICE guidelines suggest that long-term opioid use for such conditions provides **no functional benefit** and carries significant risks of harm.

Question 121: A 57-year-old woman presents with a 9-week history of intermittent fever (38.2-38.8°C), night sweats, and a 7kg weight loss. She recently returned from volunteering in rural India 4 months ago. Examination reveals enlarged cervical lymph nodes (2cm, rubbery, non-tender). Chest X-ray shows bilateral hilar lymphadenopathy. Mantoux test shows 18mm induration at 72 hours. What is the most appropriate next step in management?

A. Arrange lymph node biopsy (Correct Answer)
B. Start anti-tuberculosis therapy immediately
C. Request interferon-gamma release assay (IGRA)
D. Arrange CT chest for further characterisation
E. Obtain three sputum samples for acid-fast bacilli

Explanation: ***Arrange lymph node biopsy*** - This patient presents with **constitutional symptoms** (fever, night sweats, weight loss), **lymphadenopathy** (cervical and hilar), a travel history to an **endemic area** (rural India), and a **positive Mantoux test**. A **tissue diagnosis** is crucial to definitively differentiate between conditions like **Tuberculosis (TB)**, **lymphoma**, or **sarcoidosis**. - Biopsy allows for both **histological examination** (looking for caseating granulomas) and **microbiological culture** for acid-fast bacilli, which are essential for definitive diagnosis and targeted treatment, especially given the accessible **cervical lymph nodes**. *Start anti-tuberculosis therapy immediately* - While tuberculosis is a strong possibility, empirical treatment without **histological or microbiological confirmation** is generally discouraged unless the patient is critically ill, due to the significant **side effects of anti-TB drugs**. - Starting therapy prematurely risks delaying the diagnosis and appropriate treatment of alternative conditions such as **lymphoma** or **sarcoidosis**, if the patient's symptoms are not due to TB. *Request interferon-gamma release assay (IGRA)* - The patient already has a strongly positive **Mantoux test (18mm)**, which, like an IGRA, indicates exposure to *Mycobacterium tuberculosis* but does not reliably distinguish between **latent TB infection** and **active disease**. - An IGRA would provide overlapping information and would not offer the definitive **histological or microbiological proof** required to confirm active TB or rule out other causes of lymphadenopathy. *Arrange CT chest for further characterisation* - While a CT scan would provide more detailed imaging of the **bilateral hilar lymphadenopathy** and lung parenchyma, it is a **radiological investigation** and cannot provide a **definitive pathological diagnosis**. - Given the presence of readily accessible **cervical lymph nodes**, a biopsy is a more direct and higher-yield diagnostic step than relying solely on imaging, which cannot differentiate between various causes of lymphadenopathy. *Obtain three sputum samples for acid-fast bacilli* - Sputum samples are primarily useful for diagnosing **pulmonary tuberculosis**, especially in cases with active parenchymal lung disease, and for assessing infectivity. - In this case of prominent **extrapulmonary lymphadenopathy** without clear evidence of active pulmonary disease on chest X-ray, the diagnostic yield from sputum samples for acid-fast bacilli is likely to be low compared to a biopsy of the affected lymph nodes.

Question 122: According to current guidance for primary care assessment of unexplained weight loss in adults, which of the following defines clinically significant unintentional weight loss requiring investigation?

A. Loss of 3% of body weight over 3 months
B. Loss of 5% of body weight over 6-12 months (Correct Answer)
C. Loss of 7% of body weight over 12 months
D. Loss of 10% of body weight over any time period
E. Any weight loss accompanied by other symptoms

Explanation: ***Loss of 5% of body weight over 6-12 months*** - This is the widely accepted **clinical threshold** for **unexplained weight loss** in adults, triggering investigation for potential underlying pathologies like **malignancy**, **chronic infections**, or endocrine disorders. - A 5% loss over this period is considered significant enough to warrant a workup, distinguishing it from normal weight fluctuations or minor short-term changes. *Loss of 3% of body weight over 3 months* - While a 3% loss may be noted, it typically falls below the **established threshold** for defining clinically significant weight loss requiring extensive investigation in primary care. - This smaller percentage over a shorter period is more prone to **normal physiological variations** and may not indicate serious underlying pathology. *Loss of 7% of body weight over 12 months* - Setting the threshold at 7% over 12 months is **too high** and could potentially delay the diagnosis of serious conditions, as a **5% loss** is generally considered sufficient to prompt earlier investigation. - The standard guidelines aim for a more sensitive detection point to catch diseases earlier, making 7% a less optimal primary screening criterion. *Loss of 10% of body weight over any time period* - A 10% weight loss is indeed significant, but the lack of a defined **time frame** makes this criterion less precise for primary care screening. - Guidelines emphasize the rate of loss (e.g., over 6-12 months) as crucial for differentiating between acute, concerning pathology and slower, less urgent changes. *Any weight loss accompanied by other symptoms* - While other symptoms often accompany significant weight loss and are important for a comprehensive assessment, the definition of **clinically significant weight loss** itself relies on objective percentage and time criteria. - This option is too **broad and subjective** as a standalone definition for initiating a focused investigation based solely on unexplained weight loss.

Question 123: A 49-year-old woman presents with a 14-week history of fatigue and a 6kg weight loss. She describes generalised muscle aches and reports that her urine has been darker than usual. Examination reveals mild jaundice and hepatomegaly of 3cm below the costal margin. Blood tests show: bilirubin 45 μmol/L, ALT 450 U/L, ALP 180 U/L, albumin 38 g/L. What is the most likely diagnosis?

A. Primary biliary cholangitis
B. Autoimmune hepatitis (Correct Answer)
C. Hepatitis C infection
D. Non-alcoholic steatohepatitis
E. Haemochromatosis

Explanation: ***Autoimmune hepatitis*** - This patient presents with a **hepatitic pattern** of liver injury, characterized by a significantly elevated **ALT (450 U/L)** compared to a modest rise in **ALP**, common in middle-aged women. - The insidious onset of **fatigue**, **weight loss**, **jaundice**, and **muscle aches** combined with **hepatomegaly** is highly suggestive of this autoimmune process. *Primary biliary cholangitis* - This condition typically presents with a **cholestatic pattern**, where the **ALP** would be significantly more elevated than the transaminases. - It is frequently associated with **pruritus** and the presence of **anti-mitochondrial antibodies (AMA)**, which differ from the hepatocellular injury seen here. *Hepatitis C infection* - While it can cause chronic hepatitis, it often remains **asymptomatic** for years and rarely presents with such a sharp, subacute rise in ALT without specific risk factors. - Diagnosis would require a positive **HCV antibody** or **RNA test**, and the clinical picture in a middle-aged woman more strongly favors an autoimmune etiology. *Non-alcoholic steatohepatitis* - This typically presents with mild elevations in transaminases and is often associated with **metabolic syndrome**, obesity, or **type 2 diabetes**. - It rarely causes a 10-fold increase in **ALT** or significant **weight loss**; rather, it is usually an incidental finding on routine bloods. *Haemochromatosis* - This is a chronic iron overload disorder that usually presents with much more gradual symptoms like **arthralgia** or **skin bronzing**. - Liver tests generally show mild abnormalities rather than the acute **hepatitic rise** in ALT and bilirubin seen in this case.

Question 124: A 66-year-old man with type 2 diabetes presents with a 5-month history of progressive weight loss (11kg) despite good appetite, increased urinary frequency, and persistent fatigue. His current medications include metformin 1g BD. HbA1c is 98 mmol/mol (11.2%). Random glucose is 19.4 mmol/L. What is the most appropriate immediate management?

A. Increase metformin to 1g TDS and review in 2 weeks
B. Add gliclazide 40mg BD and continue metformin
C. Start insulin therapy and refer to diabetes specialist nurse (Correct Answer)
D. Add empagliflozin 10mg OD and continue metformin
E. Arrange urgent CT pancreas to exclude malignancy

Explanation: ***Start insulin therapy and refer to diabetes specialist nurse*** - The presentation of **significant weight loss**, polyuria, and severe hyperglycemia (**HbA1c 98 mmol/mol** or 11.2%) indicates an **insulin-deficient state** that necessitates immediate replacement. - **NICE guidelines** recommend starting insulin in type 2 diabetics who exhibit marked symptoms of hyperglycemia and catabolism, regardless of previous oral therapy. *Increase metformin to 1g TDS and review in 2 weeks* - The maximum effective dose of metformin is typically **2g daily**; increasing to 3g (TDS) provides minimal additional glycemic benefit and will not correct severe **catabolic symptoms**. - Metformin is an **insulin sensitizer** and is insufficient when there is profound endogenous **insulin deficiency**, as evidenced by rapid weight loss and marked hyperglycemia. *Add gliclazide 40mg BD and continue metformin* - Although sulfonylureas stimulate insulin secretion, they are unlikely to bridge the significant insulin gap in a patient with an **HbA1c >90 mmol/mol** and major weight loss. - Relying on oral medications in the face of severe **osmotic symptoms** and fatigue risks a metabolic crisis such as **Hyperosmolar Hyperglycemic State (HHS)**. *Add empagliflozin 10mg OD and continue metformin* - **SGLT-2 inhibitors** should be used cautiously or avoided in patients with suspected **insulin deficiency** or significantly high glucose levels, due to an increased risk of **euglycemic ketoacidosis**. - This class of drug does not address the underlying **catabolic state** caused by severe insulin deficiency and would be insufficient to manage an HbA1c of 11.2%. *Arrange urgent CT pancreas to exclude malignancy* - While unexplained weight loss in an older patient can signal **pancreatic cancer**, the classical symptoms of **polyuria, polydipsia (implied by urinary frequency), and good appetite** (a key differentiator from malignancy-related anorexia) point directly to uncontrolled diabetes. - Addressing the **immediate metabolic risk** through insulin therapy takes clinical priority over imaging when the hyperglycemia comprehensively explains the clinical picture.

Question 125: A 31-year-old woman presents with a 10-week history of profound fatigue, low-grade fever (37.8°C), and 4kg weight loss. She reports feeling cold all the time despite adequate heating. Examination reveals a pulse of 58 bpm, blood pressure 100/65 mmHg, and dry skin. Thyroid is not palpable. What is the single most appropriate initial investigation?

A. Thyroid-stimulating hormone and free T4 (Correct Answer)
B. Full blood count and ferritin
C. Cortisol level (9 am)
D. Erythrocyte sedimentation rate
E. HIV serology

Explanation: ***Thyroid-stimulating hormone and free T4*** - The patient's symptoms, including profound fatigue, **cold intolerance**, **bradycardia** (58 bpm), and **dry skin**, are highly suggestive of **hypothyroidism**. - Measuring **TSH and free T4** is the most appropriate initial investigation to confirm or rule out thyroid dysfunction, which would explain the observed metabolic slowing. *Full blood count and ferritin* - While **anemia** and **iron deficiency** can cause fatigue and cold sensations, they do not typically present with **bradycardia** or characteristic **dry skin**. - This investigation is less specific for the constellation of hypometabolic symptoms compared to thyroid hormone assessment. *Cortisol level (9 am)* - **Adrenal insufficiency** can cause fatigue, weight loss, and hypotension, but it is typically associated with **hyperpigmentation** (in primary Addison's) and often not with **bradycardia** or prominent **cold intolerance**. - Although important for constitutional symptoms, the overall clinical picture points more strongly towards thyroid pathology initially. *Erythrocyte sedimentation rate* - **ESR** is a non-specific marker of **inflammation** and would not provide a definitive diagnosis for the patient's specific symptoms. - It does not explain the distinct features of **bradycardia**, **cold intolerance**, or **dry skin** that are central to this clinical presentation. *HIV serology* - HIV infection can cause constitutional symptoms such as fatigue, weight loss, and fever, especially in its acute or advanced stages. - However, it does not typically manifest with classic signs of a hypometabolic state like **bradycardia** or **cold intolerance**.

Question 126: A 72-year-old woman presents with a 4-week history of daily fever peaking at 38.9°C, accompanied by night sweats and a 5kg weight loss. She has no significant medical history. Examination reveals moderate splenomegaly but is otherwise unremarkable. Blood tests show haemoglobin 98 g/L, white cell count 3.2 × 10⁹/L, and platelets 105 × 10⁹/L. Chest X-ray and urinalysis are normal. What is the most appropriate next investigation?

A. CT chest, abdomen and pelvis
B. Bone marrow aspiration and trephine biopsy (Correct Answer)
C. Abdominal ultrasound scan
D. Blood cultures (three sets)
E. Echocardiography

Explanation: ***Bone marrow aspiration and trephine biopsy*** - The patient presents with **fever of unknown origin (FUO)**, **B symptoms** (fever, night sweats, weight loss), **splenomegaly**, and **pancytopenia** (low haemoglobin, white cell count, and platelets). - This clinical picture is highly suggestive of a **hematological malignancy** (e.g., leukemia, myelodysplastic syndrome, lymphoma infiltrating the marrow) or a **marrow infiltrative disorder**, making bone marrow examination crucial for definitive diagnosis. *CT chest, abdomen and pelvis* - While a **CT scan** can identify **lymphadenopathy** or organ involvement by malignancy, it is an imaging study that does not directly diagnose the cause of **pancytopenia**. - In the presence of **pancytopenia** and strong suspicion of marrow pathology, a direct examination of the **bone marrow** is diagnostically superior and more urgent. *Abdominal ultrasound scan* - The clinical examination already revealed **moderate splenomegaly**, so an **abdominal ultrasound** would primarily confirm this finding without providing a specific diagnosis for the underlying cause of splenomegaly and **pancytopenia**. - It cannot differentiate between various causes of splenomegaly like **malignancy**, infection, or portal hypertension, and would not explain the **pancytopenia**. *Blood cultures (three sets)* - **Blood cultures** are a standard part of the workup for **fever of unknown origin** to rule out bacteremia or fungemia, especially in the context of night sweats. - However, the presence of significant **pancytopenia** and **splenomegaly** points away from a simple bloodstream infection as the primary etiology and more towards a underlying **hematologic or systemic disease** affecting bone marrow production. *Echocardiography* - **Echocardiography** is primarily used to investigate cardiac conditions, most notably **infective endocarditis**, which can cause fever and weight loss. - However, the patient does not have a new heart murmur, embolic phenomena, or other signs specifically pointing to **endocarditis**, and the pronounced **pancytopenia** is not typically a primary feature of endocarditis.

Question 127: A 62-year-old woman presents with 10 weeks of progressive fatigue, 9kg weight loss, and right upper quadrant discomfort. She has a history of ulcerative colitis diagnosed 20 years ago. Examination reveals mild hepatomegaly. Liver function tests show ALP 456 U/L, ALT 78 U/L, bilirubin 52 μmol/L. Which investigation would most specifically establish the underlying diagnosis?

A. MRCP (magnetic resonance cholangiopancreatography) (Correct Answer)
B. CA 19-9 tumour marker
C. Abdominal ultrasound with Doppler
D. Liver biopsy
E. Anti-mitochondrial antibodies

Explanation: ***MRCP (magnetic resonance cholangiopancreatography)***- This patient's history of **longstanding ulcerative colitis** coupled with **cholestatic liver enzymes** (elevated ALP, bilirubin) strongly suggests **Primary Sclerosing Cholangitis (PSC)**.- **MRCP** is the gold standard for diagnosing PSC, as it non-invasively visualizes the characteristic **multifocal strictures and dilations** ("beading" pattern) of the intrahepatic and/or extrahepatic bile ducts.*CA 19-9 tumour marker*- **CA 19-9** is primarily used as a marker for **cholangiocarcinoma**, a potential complication of PSC, but it is not specific for diagnosing PSC itself.- It can be elevated in various benign cholestatic conditions, making it unsuitable for establishing the primary diagnosis.*Abdominal ultrasound with Doppler*- **Abdominal ultrasound** is useful for an initial assessment, to rule out common bile duct obstruction (e.g., gallstones) and assess for biliary dilatation.- However, it lacks the resolution to visualize the subtle and diffuse **strictures and dilations** within the small intrahepatic ducts characteristic of PSC.*Liver biopsy*- **Liver biopsy** can show characteristic **"onion-skin" fibrosis** around bile ducts in PSC, but this finding is only present in a minority of cases.- Due to the **patchy nature** of PSC, a biopsy can miss affected areas and may not be diagnostic, especially if large duct involvement is dominant. It is typically reserved for cases where imaging is equivocal.*Anti-mitochondrial antibodies*- **Anti-mitochondrial antibodies (AMA)** are the serological hallmark for **Primary Biliary Cholangitis (PBC)**, another chronic cholestatic liver disease.- PBC is distinct from PSC; it primarily affects small intrahepatic bile ducts and is less commonly associated with ulcerative colitis, and PSC patients are typically **AMA negative**.

Question 128: A 51-year-old man with HIV (CD4 count 95 cells/mm³) on antiretroviral therapy presents with 4 weeks of fever up to 38.5°C, headaches, and progressive fatigue. He has lost 5kg. Examination reveals oral candidiasis. Chest X-ray is normal. Blood cultures show no growth after 48 hours. What is the most appropriate next investigation to identify the cause of his fever?

A. Serum cryptococcal antigen test (Correct Answer)
B. CT chest with contrast for atypical infections
C. Toxoplasma serology and CT brain
D. Bone marrow aspirate and culture
E. Repeat blood cultures for mycobacteria

Explanation: ***Serum cryptococcal antigen test*** - In a patient with HIV and a **CD4 count <100 cells/mm³**, the combination of fever and headache necessitates urgent screening for **Cryptococcus neoformans**, which is a leading cause of meningitis in this population. - The **serum cryptococcal antigen (CrAg) test** is highly sensitive and specific, often becoming positive weeks before the onset of clinical meningitis, making it a critical first step in the workup. *CT chest with contrast for atypical infections* - While useful for evaluating **Pneumocystis jirovecii** or **tuberculosis**, a chest CT is less prioritized here because the **Chest X-ray is normal** and the patient has prominent neurological symptoms (headaches). - It would not be the most high-yield next step to explain a fever accompanied by specific **central nervous system** complaints. *Toxoplasma serology and CT brain* - **Toxoplasmosis** typically presents with **focal neurological deficits** or seizures rather than just a generalized headache and fever. - While a CT brain might eventually be needed, **serum CrAg** is a more rapid and non-invasive initial screening tool for the most common cause of fungal meningitis in AIDS patients. *Bone marrow aspirate and culture* - This is an invasive procedure usually reserved for identifying **disseminated mycobacterial** or fungal infections when less invasive tests are negative. - It is not indicated as a first-line investigation when a **serum antigen test** can quickly identify a likely pathogen like Cryptococcus. *Repeat blood cultures for mycobacteria* - While **Mycobacterium avium complex (MAC)** is common at CD4 counts <50 cells/mm³, blood cultures for mycobacteria take weeks to yield results. - This study should be performed, but it lacks the **immediate diagnostic utility** and sensitivity of a serum CrAg in a patient currently presenting with headaches.

Question 129: A 45-year-old woman presents with 14 weeks of fatigue and widespread pain. Pain assessment using the Brief Pain Inventory shows pain scores of 7/10 with significant interference in mood, sleep, and relationships but minimal impact on physical activities like walking. What does this pain assessment pattern most importantly suggest about her condition?

A. The pain has predominantly neuropathic characteristics
B. There is significant central pain sensitization with psychological impact (Correct Answer)
C. The pain assessment is inconsistent and suggests symptom exaggeration
D. Physical deconditioning is the primary underlying problem
E. Inflammatory arthritis with extra-articular manifestations is likely

Explanation: ***There is significant central pain sensitization with psychological impact*** - High pain scores (7/10) with **widespread pain** and fatigue, combined with *significant interference in mood, sleep, and relationships* but *minimal impact on physical activities like walking*, is highly suggestive of **central pain sensitization**, often seen in conditions such as **fibromyalgia**. - This pattern reflects a **biopsychosocial** model of pain where central nervous system processing amplifies pain signals, leading to profound emotional and social distress that is disproportionate to overt physical impairment. *The pain has predominantly neuropathic characteristics* - **Neuropathic pain** typically involves specific descriptors such as **burning, tingling, shooting, or electric shock-like sensations**, often localized to a dermatomal or specific nerve distribution, which are not described here. - While neuropathic pain can be debilitating, the prominent dissociation between psychological interference and preserved basic physical activities points away from a primary neuropathic mechanism. *The pain assessment is inconsistent and suggests symptom exaggeration* - The described pattern of high pain severity with significant psychological impact and relatively preserved physical function is a recognized feature of **chronic primary pain syndromes** (nociplastic pain), not necessarily indicative of symptom exaggeration. - Dismissing this presentation as inconsistent overlooks the complex neurobiological and psychosocial mechanisms involved in chronic pain, particularly **central sensitization**. *Physical deconditioning is the primary underlying problem* - **Physical deconditioning** would characteristically manifest as significant impairment in **physical activities, reduced endurance, and muscle weakness**, directly affecting mobility and tasks like walking. - The patient explicitly reports *minimal impact on physical activities like walking*, which makes physical deconditioning an unlikely *primary* underlying problem, though it can be a secondary consequence of chronic pain. *Inflammatory arthritis with extra-articular manifestations is likely* - **Inflammatory arthritis** typically presents with objective signs of inflammation such as **joint swelling, warmth, tenderness**, and **morning stiffness** that improves with activity, along with potentially elevated inflammatory markers (ESR, CRP). - While inflammatory conditions can cause widespread pain and fatigue, the absence of specific inflammatory signs and the *minimal impact on physical activities* make this diagnosis less likely than a central pain syndrome.

Question 130: A 76-year-old man presents with 7 weeks of profound fatigue, loss of appetite, and unintentional weight loss of 8kg. He describes feeling generally unwell with diffuse aches. Examination reveals temporal artery prominence with tenderness. ESR is 95 mm/hr, CRP 78 mg/L. He mentions occasional visual disturbances. What is the most appropriate immediate management?

A. Arrange urgent temporal artery biopsy within 48 hours before treatment
B. Start prednisolone 60mg daily immediately and arrange urgent ophthalmology review (Correct Answer)
C. Start prednisolone 15mg daily and arrange temporal artery ultrasound
D. Refer urgently to rheumatology for same-day assessment
E. Admit to hospital for IV methylprednisolone therapy

Explanation: ***Start prednisolone 60mg daily immediately and arrange urgent ophthalmology review*** - This patient presents with classic features of **Giant Cell Arteritis (GCA)**, and the presence of **visual disturbances** makes it a medical emergency to prevent irreversible blindness. - High-dose **oral prednisolone (40-60mg)** is the standard immediate treatment when there are no established visual losses, and an **urgent ophthalmology review** is mandatory to assess for ischemic complications. *Arrange urgent temporal artery biopsy within 48 hours before treatment* - Treatment with **steroids must not be delayed** for a biopsy, as the risk of permanent vision loss is extremely high while waiting for the procedure. - **Temporal artery biopsy** remains the gold standard for diagnosis and can still be performed accurately up to **2 weeks after starting steroids**. *Start prednisolone 15mg daily and arrange temporal artery ultrasound* - A dose of **15mg prednisolone** is appropriate for **Polymyalgia Rheumatica (PMR)** but is insufficient to treat the vascular inflammation associated with GCA. - Clinical suspicion of GCA requires much higher doses to prevent **ischemic optic neuropathy**, regardless of the pending ultrasound results. *Refer urgently to rheumatology for same-day assessment* - While rheumatology involvement is important for long-term management, the **immediate priority** is starting high-dose steroids to protect the patient's vision. - Delaying the first dose of steroids to wait for a specialist consultation in a primary care setting increases the risk of **permanent eye damage**. *Admit to hospital for IV methylprednisolone therapy* - **Intravenous methylprednisolone** is typically reserved for patients with evolving or established **visual loss** or amaurosis fugax at presentation. - Since this patient has "occasional" disturbances rather than acute visual loss, starting **high-dose oral therapy** and immediate referral is the appropriate initial step.

Question 131: A 54-year-old woman presents with 9 weeks of fatigue, 6kg weight loss, and persistent lower back pain. The pain is worse at night and not relieved by rest. She reports occasional night sweats. ESR is 68 mm/hr. Plain X-ray spine shows loss of disc space at L2-L3 with endplate irregularity. What is the most important next investigation?

A. MRI spine with contrast (Correct Answer)
B. CT-guided biopsy of affected vertebrae
C. Blood cultures and full septic screen
D. Whole body bone scan
E. Serum and urine protein electrophoresis

Explanation: ***MRI spine with contrast*** - The patient presents with **red flags** for spinal pathology (fatigue, weight loss, night pain, elevated ESR) and X-ray findings showing **loss of disc space and endplate irregularity**, which strongly suggest **infectious discitis/osteomyelitis** or a metastatic process. - **MRI with contrast** is the gold standard imaging modality as it provides high sensitivity and specificity for early detection of infection or malignancy, accurately assesses **spinal cord compression**, and visualizes **paravertebral abscesses** or soft tissue masses better than any other modality. *CT-guided biopsy of affected vertebrae* - This is essential for obtaining a **microbiological or histological diagnosis** to guide appropriate treatment for infection or malignancy. - However, it is typically performed **after an MRI** has localized the lesion, defined the extent of disease, and excluded urgent complications like cord compression, which require immediate attention. *Blood cultures and full septic screen* - These are crucial in the workup for suspected **vertebral osteomyelitis** to identify the causative organism, guiding empiric antibiotic therapy. - While important for diagnosis, they provide no anatomical information regarding the extent of spinal involvement, potential complications like **abscess formation** or **cord compression**, which an MRI would immediately reveal. *Whole body bone scan* - A **Technetium-99m bone scan** is sensitive for identifying areas of increased bone turnover, making it useful for detecting multifocal bone disease. - However, it lacks the **anatomical detail** and specificity of MRI, often failing to differentiate definitively between **infection, malignancy, and trauma** at a specific vertebral level. *Serum and urine protein electrophoresis* - These tests are used to screen for **Multiple Myeloma**, which can present with back pain, weight loss, and elevated ESR in older patients. - However, classic myeloma characteristically **spares the disc space**, whereas this patient's X-ray specifically shows **loss of disc space**, pointing more towards an infectious process or metastasis rather than myeloma.

Question 132: A 29-year-old man presents with 5 weeks of daily fever up to 39.5°C, arthralgia, and a salmon-pink rash on his trunk that appears during fever spikes. Blood tests show WCC 18 × 10⁹/L (neutrophilia), ferritin 4800 μg/L, CRP 145 mg/L. Blood cultures are negative. Autoimmune screen including ANA and rheumatoid factor is negative. What is the most likely diagnosis?

A. Acute rheumatic fever
B. Infective endocarditis
C. Adult-onset Still's disease (Correct Answer)
D. Systemic lupus erythematosus
E. Lymphoma

Explanation: ***Adult-onset Still's disease***- Characterized by the classic triad of **high spiking fevers** (quotidian fever), **arthralgia**, and an **evanescent salmon-pink rash** on the trunk and proximal extremities that typically coincides with fever peaks.- Laboratory findings are highly specific, showing **extreme hyperferritinemia** (often >1000 ng/mL, here 4800 μg/L), **neutrophilic leukocytosis** (WCC 18 × 10⁹/L), elevated **CRP**, and a **negative autoimmune screen** (ANA/RF).*Acute rheumatic fever*- Typically follows a **Group A Streptococcus** infection and presents with **migratory polyarthritis** and carditis, not daily spiking fevers and an evanescent rash.- Diagnosis is based on **Jones criteria**, and it lacks the characteristic **extreme hyperferritinemia** and negative autoimmune screen seen in this patient.*Infective endocarditis*- Usually presents with persistent fever, new or changing **heart murmurs**, and peripheral signs like **Osler nodes**, **Janeway lesions**, or **Roth spots**.- Diagnosis typically requires **positive blood cultures** and echocardiographic evidence of vegetations, both of which are absent or negative in this case.*Systemic lupus erythematosus*- Commonly presents with a **malar rash**, photosensitivity, and multi-organ involvement (e.g., serositis, renal disease), but the rash is typically fixed, not evanescent and salmon-pink.- Most patients have a **positive Antinuclear Antibody (ANA)** test, whereas this patient’s autoimmune screen was negative.*Lymphoma*- Often presents with **B-symptoms** such as unexplained fever (often nocturnal), drenching night sweats, weight loss, and painless **lymphadenopathy**.- While it can cause fever and elevated ferritin, it does not typically cause the specific **evanescent salmon-pink maculopapular rash** associated with fever spikes and negative autoimmune markers.

Question 133: A 68-year-old man with metastatic prostate cancer presents with severe bone pain inadequately controlled on paracetamol 1g QDS and codeine 60mg QDS. Pain score is 8/10. He experiences pain throughout the day and night, affecting sleep and mobility. Which pain management principle should guide the next step in his treatment?

A. Add gabapentin for neuropathic bone pain component
B. Convert to equivalent dose strong opioid with breakthrough medication (Correct Answer)
C. Increase codeine to 90mg QDS and add ibuprofen
D. Switch to transdermal buprenorphine patch
E. Add amitriptyline for pain and sleep improvement

Explanation: ***Convert to equivalent dose strong opioid with breakthrough medication*** - The patient's severe pain (8/10) and inadequate control on paracetamol and codeine (WHO Step 2 analgesics) necessitate an escalation to **WHO Step 3**, which involves initiating **strong opioids** like morphine. - The next step involves converting his current opioid intake to an **equivalent dose of a strong opioid** (e.g., oral morphine, approximately 24mg daily from 240mg codeine) and providing **breakthrough medication** for acute pain exacerbations. *Add gabapentin for neuropathic bone pain component* - While bone pain can have a neuropathic component, the primary issue is uncontrolled **nociceptive cancer pain**, requiring a more potent opioid first. - **Gabapentin** is an adjuvant for **neuropathic pain** and should be considered after achieving better baseline control of nociceptive pain with appropriate opioid therapy. *Increase codeine to 90mg QDS and add ibuprofen* - **Codeine** exhibits a **ceiling effect** at 240mg per day (60mg QDS), meaning higher doses offer no significant additional analgesia but increase the risk of **side effects**. - Adding an **NSAID** like ibuprofen may provide some analgesia for bone pain, but it is insufficient for a patient with a **pain score of 8/10** already on maximal weak opioid therapy, and carries risks of **GI and renal toxicity**. *Switch to transdermal buprenorphine patch* - **Transdermal patches** like buprenorphine are generally not suitable for the **initial titration** of severe, unstable cancer pain due to their slow onset of action and difficulty with rapid dose adjustments. - **Buprenorphine** is a **partial opioid agonist** with a ceiling effect, making it less flexible than a full agonist (like morphine) for escalating severe, uncontrolled pain. *Add amitriptyline for pain and sleep improvement* - **Amitriptyline** is a tricyclic antidepressant used as an adjuvant for **neuropathic pain** and sleep, but it does not address the underlying severe **metastatic bone pain** that requires a strong opioid. - While it may help with sleep, prioritizing an adjuvant over the necessary escalation to **strong opioids** for severe ongoing pain would delay effective pain relief.

Question 134: A 39-year-old woman presents with 12 weeks of persistent fatigue, poor sleep quality, and widespread pain. She describes the pain as constant, affecting neck, back, arms and legs with no clear pattern. Examination reveals multiple tender points but no joint swelling or inflammation. Blood tests including FBC, CRP, TSH, and vitamin D are all normal. What pain assessment tool is most appropriate for monitoring her condition?

A. Fibromyalgia Impact Questionnaire (FIQ) (Correct Answer)
B. Visual Analogue Scale (VAS) for pain intensity
C. Brief Pain Inventory (BPI)
D. McGill Pain Questionnaire
E. DN4 neuropathic pain questionnaire

Explanation: ***Fibromyalgia Impact Questionnaire (FIQ)***- The **Fibromyalgia Impact Questionnaire (FIQ)** is the gold-standard tool specifically designed to assess and monitor the multidimensional impact of **fibromyalgia**, including physical function, fatigue, and sleep quality.- Given the patient's symptoms of **widespread pain**, fatigue, and normal inflammatory markers, the FIQ is most appropriate for evaluating **treatment response** and disease severity.*Visual Analogue Scale (VAS) for pain intensity*- Measuring **pain intensity** alone via a VAS is insufficient for fibromyalgia, as it fails to capture associated symptoms like **fatigue** and **cognitive dysfunction**.- While useful for quick assessments, it lacks the **specificity** required for the comprehensive management of complex chronic pain syndromes.*Brief Pain Inventory (BPI)*- The **Brief Pain Inventory** is primarily used to assess how pain interferes with daily activities in patients with **chronic cancer** or non-cancer pain.- While it assesses **pain interference**, it is not as specialized as the FIQ for tracking the specific **biopsychosocial clusters** found in fibromyalgia.*McGill Pain Questionnaire*- This tool focuses on the **sensory and affective qualities** of pain (e.g., throbbing, stabbing) rather than the overall functional impact of a specific syndrome.- It is less effective than the FIQ for monitoring the **holistic progression** of fibromyalgia symptoms over time.*DN4 neuropathic pain questionnaire*- The **DN4** is a screening tool specifically designed to identify **neuropathic pain** components, such as burning or tingling, which require different management.- Fibromyalgia is categorized as **nociplastic pain** rather than pure neuropathic pain, making the DN4 inappropriate for monitoring its overall impact.

Question 135: A 63-year-old woman presents with 4 months of bilateral shoulder and hip girdle pain with marked morning stiffness lasting over 2 hours. She describes difficulty rising from chairs and combing her hair. She reports fatigue and 4kg weight loss. ESR is 82 mm/hr, CRP 56 mg/L. Creatine kinase is normal. What is the most appropriate initial treatment?

A. Prednisolone 15mg daily (Correct Answer)
B. Naproxen 500mg twice daily
C. Methotrexate 15mg weekly
D. Physiotherapy and exercise programme
E. Referral to rheumatology before starting treatment

Explanation: ***Prednisolone 15mg daily*** - The patient's symptoms, including bilateral shoulder and hip girdle pain, marked morning stiffness lasting over 2 hours, and elevated **ESR/CRP** with normal **creatine kinase**, are classic for **Polymyalgia Rheumatica (PMR)**.- **Low-dose oral corticosteroids** like **prednisolone** are the most appropriate initial treatment for PMR, leading to rapid and dramatic symptom improvement. *Naproxen 500mg twice daily* - **NSAIDs** like naproxen may offer some symptomatic pain relief but do not address the underlying systemic inflammation of **PMR**.- They are insufficient to control the disease's activity, which is characterized by significantly elevated **inflammatory markers**. *Methotrexate 15mg weekly* - **Methotrexate** is a **steroid-sparing agent** typically reserved for patients with recurrent relapses, those requiring prolonged high-dose steroids, or those unable to taper steroids.- It is not indicated as a first-line therapy for the initial management of uncomplicated **PMR**. *Physiotherapy and exercise programme* - While **physiotherapy** and exercise are beneficial for maintaining mobility and function, they are **adjunctive therapies** and cannot treat the systemic inflammation of **PMR**.- This condition requires potent anti-inflammatory medication to control symptoms and reduce inflammatory markers. *Referral to rheumatology before starting treatment* - For a classic presentation of **PMR** as described, initial corticosteroid treatment should ideally be commenced in **primary care** to provide rapid relief and prevent unnecessary suffering.- Referral to **rheumatology** is usually reserved for atypical cases, diagnostic uncertainty, or treatment failure.

Question 136: According to current UK guidelines, which of the following features is essential to define a classic fever of unknown origin (FUO) in an ambulatory patient?

A. Temperature >38.0°C on multiple occasions for at least 3 days with no diagnosis after appropriate initial investigations
B. Temperature >38.3°C on several occasions for at least 3 weeks with no diagnosis after one week of investigation (Correct Answer)
C. Temperature >37.8°C for at least 2 weeks with negative blood cultures and chest X-ray
D. Unexplained fever for at least 4 weeks in a patient without immunocompromise
E. Persistent fever with negative investigations after 48 hours of inpatient assessment

Explanation: ***Temperature >38.3°C on several occasions for at least 3 weeks with no diagnosis after one week of investigation*** - The classic definition of **Fever of Unknown Origin (FUO)** requires a documented temperature of **>38.3°C** (101°F) to ensure the fever is clinically significant and not just a mild elevation. - The criteria also mandate a duration of at least **3 weeks** and a failure to reach a diagnosis after **one week** of intensive outpatient or inpatient investigation, indicating a thorough workup has been completed. *Temperature >38.0°C on multiple occasions for at least 3 days with no diagnosis after appropriate initial investigations* - While **38.0°C** is often the threshold for a general fever, the **Petersdorf and Beeson** criteria, widely adopted for classic FUO, specifically require **>38.3°C**. - A **3-day** duration is insufficient to differentiate FUO from common, self-limiting viral illnesses which typically resolve within a week. *Temperature >37.8°C for at least 2 weeks with negative blood cultures and chest X-ray* - The temperature threshold of **>37.8°C** is too low and does not meet the established diagnostic criteria for **classic FUO**. - Although negative **blood cultures** and **chest X-ray** are standard initial steps, the definition specifically requires failure of a broader and more comprehensive **one-week** diagnostic workup, not just these initial tests. *Unexplained fever for at least 4 weeks in a patient without immunocompromise* - While classic FUO occurs in non-immunocompromised patients, the standard time requirement is **3 weeks**, not **4 weeks**. - This description lacks the specific **temperature threshold** (>38.3°C) necessary to satisfy clinical guidelines for FUO. *Persistent fever with negative investigations after 48 hours of inpatient assessment* - A **48-hour** assessment period is diagnostic for **nosocomial FUO** in some contexts, but classic FUO requires a much longer period of **3 weeks** of symptoms. - The criteria for an **ambulatory patient** specifically involve at least **three outpatient visits** or one week of thorough investigation to qualify as FUO, which is a more prolonged process than 48 hours.

Question 137: A 47-year-old woman presents with 6 months of progressive fatigue, 7kg weight loss, and polyuria. She reports increased thirst and recurrent oral thrush. Random blood glucose is 16.2 mmol/L. HbA1c is 78 mmol/mol (9.3%). BMI is 22 kg/m². She has no family history of diabetes. What is the most important next step in management?

A. Start metformin and arrange follow-up in 3 months
B. Check anti-GAD and islet cell antibodies (Correct Answer)
C. Start metformin and SGLT2 inhibitor
D. Refer to secondary care for insulin therapy
E. Arrange pancreatic imaging with CT

Explanation: ***Check anti-GAD and islet cell antibodies*** - The patient's presentation with **progressive fatigue**, **significant weight loss (7kg)**, **polyuria**, **increased thirst**, **recurrent oral thrush**, and a **normal BMI (22 kg/m²)**, despite high blood glucose and HbA1c, strongly suggests an **insulin-deficient state**. - Checking **anti-GAD** and **islet cell antibodies** is crucial to diagnose **Latent Autoimmune Diabetes in Adults (LADA)** or **Type 1 Diabetes**, which requires different management strategies, often involving early insulin initiation, compared to Type 2 Diabetes. *Start metformin and arrange follow-up in 3 months* - **Metformin** is primarily for **Type 2 Diabetes** (insulin resistance) and is unlikely to be sufficient for a patient with features suggestive of **severe insulin deficiency** and acute symptoms. - A 3-month follow-up is too delayed given the patient's significant symptoms and high HbA1c, as they are at risk of developing **Diabetic Ketoacidosis (DKA)**. *Start metformin and SGLT2 inhibitor* - This combination is typically used for **Type 2 Diabetes**. In patients with suspected **Type 1 Diabetes** or **LADA**, SGLT2 inhibitors can significantly increase the risk of **euglycemic diabetic ketoacidosis**, even with normal or mildly elevated blood glucose levels. - The patient's **weight loss** and **normal BMI** point away from the typical pathophysiology of Type 2 Diabetes (insulin resistance), making these drugs potentially inappropriate and risky without further diagnostic clarification. *Refer to secondary care for insulin therapy* - While the patient will likely require **insulin therapy** given the probable diagnosis of Type 1 Diabetes or LADA, the most important immediate step is to confirm the diagnosis through **autoantibody testing**. - Referral for insulin therapy without prior diagnostic clarity might lead to an incomplete assessment or delay in initiating appropriate, specific treatment, though insulin will be necessary if confirmed. *Arrange pancreatic imaging with CT* - While new-onset diabetes and weight loss can rarely be a presentation of **pancreatic cancer**, the clinical picture of **recurrent thrush**, **polyuria**, and **thirst** is more characteristic of primary hyperglycemia and an underlying **autoimmune process**. - **Pancreatic imaging** is usually considered when other

Question 138: A 41-year-old man presents with 10 weeks of fatigue, drenching night sweats, and 8kg weight loss. He mentions persistent generalized itching, particularly after hot baths. Examination reveals non-tender rubbery cervical lymphadenopathy. Blood tests show Hb 110 g/L, WCC 11.2 × 10⁹/L, ESR 65 mm/hr. What is the most likely diagnosis?

A. Hodgkin lymphoma (Correct Answer)
B. Non-Hodgkin lymphoma
C. Chronic lymphocytic leukaemia
D. Infectious mononucleosis
E. Tuberculosis

Explanation: ***Hodgkin lymphoma***- The presence of **B symptoms** (weight loss, drenching night sweats) and **rubbery, non-tender cervical lymphadenopathy** is classic for Hodgkin lymphoma.- **Aquagenic pruritus** (itching specifically after a hot bath) is a highly characteristic feature that helps distinguish it from other causes of lymphadenopathy.*Non-Hodgkin lymphoma*- While it presents with B symptoms and lymphadenopathy, **aquagenic pruritus** is significantly less common than in Hodgkin lymphoma.- It more frequently involves **extranodal sites** and typically presents in an older age group compared to the classical bimodal distribution of Hodgkin's.*Chronic lymphocytic leukaemia*- This typically presents in **older adults** (median age >70) and is often an incidental finding on blood counts showing significant **lymphocytosis**.- Although it causes lymphadenopathy, it does not typically present with the specific symptom of **itching after hot baths**.*Infectious mononucleosis*- Usually presents with an **acute history** (1-2 weeks) of sore throat, fever, and tender lymphadenopathy rather than a 10-week chronic course.- It is associated with **atypical lymphocytes** on a blood film and a positive **Monospot test**, not significant weight loss and high ESR.*Tuberculosis*- Can cause chronic weight loss, night sweats, and cervical lymphadenopathy (scrofula), but the nodes eventually become **matted and fluctuant** (cold abscess).- It lacks the association with **alcohol-induced pain** or **aquagenic pruritus**, and would typically show evidence of pulmonary involvement on imaging.

Question 139: A 56-year-old woman presents with 8 weeks of progressive fatigue and unintentional weight loss of 9kg. She describes early satiety and vague epigastric discomfort. Past medical history includes pernicious anaemia. Examination reveals a palpable epigastric mass and left supraclavicular lymphadenopathy. What is the single most appropriate initial investigation?

A. Oesophagogastroduodenoscopy with biopsy (Correct Answer)
B. CT chest, abdomen and pelvis
C. CA 19-9 and CEA tumour markers
D. Barium swallow
E. Abdominal ultrasound

Explanation: ***Oesophagogastroduodenoscopy with biopsy*** - The patient exhibits classic **red-flag symptoms** for gastric cancer, including **weight loss**, **early satiety**, an **epigastric mass**, and a **Virchow's node** (left supraclavicular lymphadenopathy). - **Pernicious anaemia** is a known risk factor for gastric malignancy; **OGD** is the gold standard for direct visualization and obtaining a definitive **histological diagnosis**. *CT chest, abdomen and pelvis* - This is a critical step for **staging** the disease and identifying **metastases** once the diagnosis is suspected. - However, it is not the **initial investigation** of choice as it cannot provide the essential **tissue biopsy** needed for diagnosis. *CA 19-9 and CEA tumour markers* - These markers lack the **sensitivity** and **specificity** required to be used as primary diagnostic or screening tools for gastric cancer. - They are more clinically useful for **monitoring response to treatment** or detecting **recurrence** in known patients. *Barium swallow* - While it can identify **structural abnormalities** or filling defects, it has been largely superseded by endoscopy in modern practice. - It does not allow for **biopsy** and may miss early-stage or small **gastric lesions**. *Abdominal ultrasound* - Ultrasound is insensitive for evaluating hollow viscera like the stomach due to **overlying bowel gas**. - It might detect liver metastases or a large mass, but it cannot confirm the **pathological type** of the tumor.

Question 140: A 32-year-old woman presents with a 3-month history of intermittent fever, night sweats, and 5kg weight loss. She recently returned from volunteer work in Southeast Asia. Examination reveals cervical and axillary lymphadenopathy. Chest X-ray shows bilateral hilar lymphadenopathy. Mantoux test is 18mm induration. What is the most appropriate next investigation?

A. Sputum microscopy and culture for acid-fast bacilli
B. CT chest, abdomen and pelvis
C. Lymph node biopsy for histology and culture (Correct Answer)
D. Interferon-gamma release assay (IGRA)
E. Bronchoscopy with bronchoalveolar lavage

Explanation: ***Lymph node biopsy for histology and culture*** - This patient presents with **B symptoms**, recent travel to a **high-risk area**, generalized **lymphadenopathy**, and a strongly positive **Mantoux test**, highly suggestive of **extrapulmonary tuberculosis**. - An **excisional lymph node biopsy** is the gold standard for diagnosis, providing tissue for **histology** (to identify **caseating granulomas**) and **microbiology culture** (for definitive identification of *Mycobacterium tuberculosis* and **drug sensitivity testing**). *Sputum microscopy and culture for acid-fast bacilli* - While crucial for **pulmonary tuberculosis**, sputum samples are often negative in cases of **extrapulmonary TB**, especially when there are no significant respiratory symptoms like cough. - Relying solely on sputum would likely delay the diagnosis of **tuberculous lymphadenitis** when accessible peripheral nodes are available for biopsy. *CT chest, abdomen and pelvis* - A CT scan can help assess the **extent of lymphadenopathy** and other organ involvement, but it is an imaging modality that cannot provide a **definitive tissue diagnosis** or confirm the etiology of the disease. - It is useful for staging but not the most appropriate **initial diagnostic investigation** to confirm active TB. *Interferon-gamma release assay (IGRA)* - IGRA, similar to the **Mantoux test**, indicates exposure to **Mycobacterium tuberculosis** but **cannot differentiate** between **latent TB infection** and **active TB disease**. - As the Mantoux test is already strongly positive (18mm), an IGRA would not provide additional information to guide the diagnosis of **active disease** in this symptomatic patient. *Bronchoscopy with bronchoalveolar lavage* - This is an **invasive procedure** primarily used to obtain samples from the **lower respiratory tract** in cases of suspected pulmonary disease, especially when sputum is negative or unobtainable. - It is less appropriate as the immediate next step when readily **accessible peripheral lymph nodes** are available for a less invasive and more direct diagnostic biopsy for **tuberculous adenitis**.

Question 141: A 38-year-old woman presents with a 9-week history of progressive fatigue, weight loss of 6kg, and persistent abdominal pain. She mentions increased thirst and urinary frequency. She appears tanned despite no recent sun exposure. Examination reveals postural hypotension (BP 118/76 mmHg lying, 92/58 mmHg standing) and hyperpigmentation of palmar creases and buccal mucosa. Blood tests show: Na⁺ 128 mmol/L, K⁺ 5.6 mmol/L, glucose 3.8 mmol/L, urea 8.2 mmol/L. What is the most appropriate next investigation to confirm the diagnosis?

A. Short synacthen test (Correct Answer)
B. 9 am cortisol and ACTH
C. CT abdomen and pelvis
D. Plasma metanephrines
E. Thyroid function tests with thyroid antibodies

Explanation: ***Short synacthen test***- The **short synacthen test (SST)** is the gold standard confirmatory investigation for **primary adrenal insufficiency (Addison's disease)** as it evaluates the adrenal gland's ability to produce cortisol in response to synthetic ACTH.- An inadequate or absent rise in **cortisol** after synacthen administration (typically below a certain threshold like >450-550 nmol/L) confirms the diagnosis.*9 am cortisol and ACTH*- While low **9 am cortisol** and elevated **ACTH** levels are highly suggestive of primary adrenal insufficiency, a single basal measurement can be influenced by stress and diurnal rhythm, lacking the definitive power of a dynamic test.- These tests provide initial evidence but are not as conclusive as a stimulation test like the **SST** for confirming adrenal insufficiency.*CT abdomen and pelvis*- This imaging modality is primarily used to identify the **underlying etiology** of adrenal insufficiency, such as **adrenal atrophy**, **hemorrhage**, **tuberculosis**, or **metastatic disease**.- It is typically performed after the biochemical diagnosis of **adrenal insufficiency** has been established and is not the initial test to confirm adrenal function.*Plasma metanephrines*- This test screens for **pheochromocytoma**, an adrenal tumor that secretes catecholamines and usually presents with **paroxysmal hypertension**, tachycardia, and diaphoresis.- The patient's presentation with **postural hypotension**, **hyperpigmentation**, **hyponatremia**, and **hyperkalemia** is inconsistent with a catecholamine-secreting tumor.*Thyroid function tests with thyroid antibodies*- While **Addison's disease** can be part of **Autoimmune Polyendocrine Syndrome (APS)**, thyroid dysfunction does not explain the classic findings of **hyperpigmentation**, **postural hypotension**, and the specific electrolyte abnormalities (low sodium, high potassium).- The clinical picture strongly points to a primary adrenal issue, making thyroid testing a secondary diagnostic step.

Question 142: A 71-year-old man presents with an 8-week history of fevers up to 38.4°C occurring every 2-3 days, progressive fatigue, and 5kg weight loss. He has a history of aortic valve replacement 4 years ago. Examination reveals temperature 37.9°C, a new early diastolic murmur, and splinter haemorrhages in two fingernails. Blood tests show: Hb 104 g/L, WCC 12.8 × 10⁹/L, CRP 95 mg/L, creatinine 145 μmol/L (baseline 88). Three sets of blood cultures taken over 24 hours are negative. What is the most appropriate next step?

A. Start empirical antibiotic therapy for culture-negative endocarditis
B. Arrange urgent transoesophageal echocardiography (Correct Answer)
C. Repeat blood cultures and extend incubation time for fastidious organisms
D. Arrange CT-PET scan to identify source of infection
E. Refer to cardiothoracic surgery for urgent assessment

Explanation: ***Arrange urgent transoesophageal echocardiography***- **Transoesophageal echocardiography (TOE)** is the investigation of choice for **prosthetic valve endocarditis (PVE)**, as it has superior sensitivity (90-100%) compared to transthoracic echocardiography for detecting vegetations and perivalvular abscesses.- The patient presents with **Duke criteria** including a **predisposing heart condition** (aortic valve replacement), fever, a **new diastolic murmur**, and **splinter haemorrhages**, making urgent imaging essential to confirm the diagnosis and assess its extent.*Start empirical antibiotic therapy for culture-negative endocarditis*- Initiating **empirical antibiotics** should ideally follow a definitive diagnosis or at least comprehensive imaging to avoid obscuring potential culture results or delaying the identification of specific pathogens.- Without prior visualization of vegetations or complications via **echocardiography**, committing to long-term intensive therapy might be premature and could delay necessary surgical evaluation.*Repeat blood cultures and extend incubation time for fastidious organisms*- While repeating blood cultures and extending incubation time is part of the workup for **culture-negative endocarditis**, it should not delay the more urgent **echocardiographic assessment** required to identify valvular damage or vegetations.- Many fastidious organisms like HACEK group are often detected within standard incubation, and specific organisms (e.g., **Bartonella, Coxiella**) require serological testing or PCR rather than simply extended culture time.*Arrange CT-PET scan to identify source of infection*- **18F-FDG PET/CT** is a valuable tool for diagnosing **PVE** when echocardiography is inconclusive, or to identify extracardiac sites of infection or emboli.- However, **transoesophageal echocardiography (TOE)** remains the gold standard for the initial, detailed assessment of **valvular vegetations**, abscesses, and assessment of valve function directly on the prosthetic valve.*Refer to cardiothoracic surgery for urgent assessment*- **Surgical consultation** is indicated in endocarditis, particularly with complications like heart failure, severe valve dysfunction, or large vegetations, which need to be characterized.- However, a definitive assessment of the extent of valvular involvement and complications through **echocardiography** is a prerequisite before a meaningful surgical referral can be made.

Question 143: A 43-year-old woman presents with a 12-week history of fatigue, poor concentration, and unrefreshing sleep. She describes widespread pain affecting multiple body sites that has persisted despite taking regular paracetamol and ibuprofen. She reports headaches, irritable bowel symptoms, and feeling 'fuzzy-headed'. Examination reveals multiple tender points but no joint swelling, muscle weakness, or abnormal neurological signs. Blood tests including FBC, TFTs, CRP, ESR, vitamin D, and B12 are all normal. What is the most appropriate management approach?

A. Refer to rheumatology for specialist assessment
B. Start low-dose amitriptyline and arrange graded exercise programme (Correct Answer)
C. Request MRI brain and spine to exclude neurological pathology
D. Start prednisolone trial for possible inflammatory condition
E. Arrange referral to chronic fatigue syndrome service

Explanation: ***Start low-dose amitriptyline and arrange graded exercise programme***- The patient's presentation with chronic **widespread pain**, **fatigue**, **unrefreshing sleep**, **cognitive dysfunction** (fibro-fog), and multiple **tender points** alongside normal inflammatory markers (ESR, CRP) is highly characteristic of **fibromyalgia**.- **Low-dose amitriptyline** is a common first-line pharmacological treatment for fibromyalgia to improve sleep and reduce pain, while a **graded exercise program** is a key non-pharmacological intervention, emphasizing a **multidisciplinary approach** to management.*Refer to rheumatology for specialist assessment*- Fibromyalgia is primarily a **clinical diagnosis**, and with typical features and normal basic investigations, initial management can often be handled in **primary care**.- Referral to rheumatology is generally considered for diagnostic uncertainty, atypical presentations, or when **first-line treatments** in primary care have been unsuccessful.*Request MRI brain and spine to exclude neurological pathology*- The patient has a completely normal **neurological examination** (no muscle weakness, abnormal signs) and no **red flag symptoms** such as focal neurological deficits or cauda equina signs, making advanced imaging like MRI unnecessary.- Symptoms like **'fuzzy-headedness'** are typical for the **cognitive dysfunction** associated with fibromyalgia, often termed 'fibro-fog', rather than indicating a structural neurological lesion.*Start prednisolone trial for possible inflammatory condition*- The patient's normal **ESR** and **CRP** effectively rule out an active **inflammatory condition** that would typically respond to corticosteroids, such as polymyalgia rheumatica or inflammatory arthritis.- **Corticosteroids** like prednisolone are not indicated for fibromyalgia, as they do not address the underlying pathophysiology and carry a significant risk of **adverse effects**.*Arrange referral to chronic fatigue syndrome service*- While there is symptom overlap with **Chronic Fatigue Syndrome (CFS/ME)**, the predominant and widespread **musculoskeletal pain** with distinct **tender points** strongly points towards **fibromyalgia**.- The initial management strategies for both conditions share common ground (e.g., activity pacing), but the primary focus in this case based on the symptom profile is on managing the chronic pain syndrome characteristic of fibromyalgia.

Question 144: A 67-year-old woman presents with a 6-week history of generalized pain affecting her shoulders, hips, and neck, associated with marked morning stiffness lasting 3 hours. She reports fatigue and difficulty rising from a chair. She denies headache or visual symptoms. Examination reveals restricted range of movement in shoulders and hips due to pain, but normal muscle strength. Blood tests show: Hb 112 g/L, CRP 68 mg/L, ESR 76 mm/hr, normal creatine kinase, normal thyroid function. What is the most appropriate initial management?

A. Start prednisolone 15mg daily and monitor response (Correct Answer)
B. Refer urgently to rheumatology before starting treatment
C. Arrange temporal artery ultrasound before starting treatment
D. Start NSAIDs and review in 2 weeks
E. Check anti-CCP and rheumatoid factor

Explanation: ***Start prednisolone 15mg daily and monitor response***- The patient's age (>50), **bilateral girdle pain** (shoulders, hips, neck), and **prolonged morning stiffness** (>45 minutes, here 3 hours) with markedly **elevated inflammatory markers (ESR, CRP)** are highly characteristic of **Polymyalgia Rheumatica (PMR)**.- **Low-dose oral corticosteroids**, typically **prednisolone 15mg daily**, are the cornerstone of PMR treatment, leading to a rapid and dramatic symptomatic improvement within days, which also serves a diagnostic purpose.*Refer urgently to rheumatology before starting treatment*- For typical presentations of **PMR** without features of **Giant Cell Arteritis (GCA)**, initial management with corticosteroids can be started in **primary care**, especially given the rapid symptomatic relief it provides.- Delaying treatment while awaiting a specialist appointment is not appropriate for a condition that responds so well to readily available medication and causes significant patient discomfort.*Arrange temporal artery ultrasound before starting treatment*- This investigation is primarily used to diagnose **Giant Cell Arteritis (GCA)**, a vasculitis that can co-exist with PMR or present independently.- The patient explicitly **denies headache or visual symptoms**, which are the cardinal "red flag" symptoms suggesting GCA; therefore, immediate imaging for GCA is not warranted at this stage.*Start NSAIDs and review in 2 weeks*- **NSAIDs** are generally ineffective for the systemic inflammatory process of **PMR** and do not provide the rapid, significant symptomatic relief seen with corticosteroids.- Delaying effective treatment with **corticosteroids** by trying NSAIDs first would prolong the patient's severe symptoms and is not considered appropriate initial management for PMR.*Check anti-CCP and rheumatoid factor*- These tests are used to diagnose **Rheumatoid Arthritis (RA)**, which typically affects small joints symmetrically and is less likely to present with isolated **girdle pain** and **prolonged morning stiffness** as the primary symptoms, especially with normal muscle strength.- While RA can have elevated inflammatory markers, the clinical picture strongly favors **PMR**, making specific RA markers a less immediate diagnostic priority compared to initiating effective PMR treatment.

Question 145: A 26-year-old man presents with a 3-week history of daily fever up to 38.8°C, sore throat, and severe fatigue. He reports a faint rash that appears when febrile. Examination reveals temperature 38.5°C, pharyngeal erythema without exudate, small tender cervical lymph nodes, and mild splenomegaly. Blood tests show: Hb 135 g/L, WCC 14.2 × 10⁹/L (lymphocytes 62%, atypical lymphocytes present), ALT 156 U/L, AST 134 U/L. Monospot test is negative. What is the most appropriate next investigation?

A. EBV serology (IgM and IgG VCA, EBNA) (Correct Answer)
B. CMV serology (IgM and IgG)
C. Throat swab for bacterial culture
D. Abdominal ultrasound to assess splenomegaly
E. HIV serology

Explanation: ***EBV serology (IgM and IgG VCA, EBNA)***- The patient's presentation (fever, sore throat, lymphadenopathy, splenomegaly, **atypical lymphocytosis**, and transaminitis) is classic for **infectious mononucleosis**.- A **negative Monospot test** can occur, especially in young adults or early in the infection; **EBV-specific serology** (IgM and IgG to VCA, and EBNA) is the most sensitive and specific test to confirm or rule out acute EBV infection.*CMV serology (IgM and IgG)*- **Cytomegalovirus (CMV)** can cause a mononucleosis-like syndrome with fever, fatigue, splenomegaly, and atypical lymphocytosis, but typically presents with less prominent **pharyngitis** and lymphadenopathy compared to EBV.- While CMV is a differential, **EBV** is statistically more common and its serology is the primary investigation when Monospot is negative in a typical mononucleosis presentation.*Throat swab for bacterial culture*- The clinical picture, including **splenomegaly**, **atypical lymphocytosis**, and **transaminitis**, is not consistent with a primary bacterial pharyngitis.- The absence of **pharyngeal exudate** further decreases the likelihood of bacterial causes like Group A Streptococcus, which would not explain the systemic findings.*Abdominal ultrasound to assess splenomegaly*- **Splenomegaly** has already been identified on physical examination, indicating it is present.- An ultrasound would confirm the presence and size of the spleen but would not provide the **etiological diagnosis** for the underlying fever and other symptoms.*HIV serology*- **Acute HIV infection** (Acute Retroviral Syndrome) can present with fever, rash, sore throat, lymphadenopathy, and sometimes splenomegaly, mimicking mononucleosis.- However, the prominent **atypical lymphocytosis (62%)** and the classic triad of symptoms are more highly suggestive of **EBV infection** as the immediate next step, although HIV serology could be considered if other causes are ruled out or risk factors are present.

Question 146: A 52-year-old woman presents with a 5-month history of fatigue and persistent lower back pain radiating to her right thigh. The pain is worse at rest and wakes her at night. She has lost 7kg unintentionally. She smoked 20 cigarettes daily for 30 years but quit 2 years ago. Examination reveals tenderness over L3-L4 vertebrae. Blood tests show: Hb 98 g/L, MCV 88 fL, calcium 2.82 mmol/L (normal 2.20-2.60), ALP 156 U/L, ESR 78 mm/hr. What is the most likely diagnosis?

A. Mechanical low back pain with osteoporotic fracture
B. Multiple myeloma (Correct Answer)
C. Spinal tuberculosis
D. Metastatic lung carcinoma to spine
E. Primary hyperparathyroidism with osteoporosis

Explanation: ***Multiple myeloma*** - The constellation of **anaemia (Hb 98 g/L)**, **hypercalcaemia (2.82 mmol/L)**, significant **unintentional weight loss**, and **persistent back pain worse at rest** and at night, along with a markedly **elevated ESR (78 mm/hr)**, strongly points to multiple myeloma. These findings are classic components of the **CRAB** criteria (Calcium elevation, Renal dysfunction, Anaemia, Bone lesions). - Multiple myeloma is a **plasma cell dyscrasia** leading to bone destruction through osteoclast activation, causing lytic lesions, bone pain, and hypercalcaemia, as well as bone marrow infiltration leading to anaemia. *Mechanical low back pain with osteoporotic fracture* - **Mechanical back pain** typically **improves with rest** and is exacerbated by activity, which contrasts with the patient's pain being **worse at rest** and waking her at night, suggesting an inflammatory or neoplastic cause. - While osteoporosis can cause fractures and pain, it does not explain the **hypercalcaemia**, **anaemia**, **unintentional weight loss**, or significantly **elevated ESR** observed in this patient. *Spinal tuberculosis* - **Spinal tuberculosis (Pott's disease)** can cause chronic back pain, weight loss, and elevated ESR, but it is less commonly associated with **hypercalcaemia** and the specific pattern of **normocytic anaemia** seen here. - Although it involves bone destruction, the constellation of symptoms and lab findings, particularly the severe hypercalcaemia, is more characteristic of multiple myeloma. *Metastatic lung carcinoma to spine* - The patient's **smoking history** is a risk factor for lung cancer, and metastases can cause back pain, weight loss, and elevated ESR. However, **hypercalcaemia** from lung cancer metastases is often associated with **PTHrP** production, and alkaline phosphatase may be more significantly elevated in osteoblastic or mixed lesions. - While lytic metastases can occur, the combination of **hypercalcaemia**, **anaemia**, and a highly elevated ESR with this specific presentation makes **multiple myeloma** a more precise fit than general metastatic lung carcinoma without further evidence of a primary lung tumor. *Primary hyperparathyroidism with osteoporosis* - **Primary hyperparathyroidism** causes **hypercalcaemia** and can lead to bone loss (osteoporosis) and bone pain. However, it would not typically cause **anaemia**, **significant unintentional weight loss**, or such a markedly **elevated ESR**. - The severity of systemic symptoms and the specific pattern of laboratory abnormalities strongly favor a malignancy like multiple myeloma over primary hyperparathyroidism as the sole diagnosis.

Question 147: A 58-year-old man with no significant past medical history presents with a 7-week history of severe fatigue, 6kg weight loss, and drenching night sweats. He denies fever, cough, or travel history. Examination reveals multiple non-tender, rubbery lymph nodes in cervical and axillary regions, the largest 3cm in diameter. He has no hepatosplenomegaly. Blood tests show: Hb 108 g/L, WCC 8.2 × 10⁹/L, lymphocytes 4.5 × 10⁹/L, LDH 580 U/L, ESR 68 mm/hr. What is the most appropriate initial investigation?

A. CT chest, abdomen and pelvis with contrast
B. Excision biopsy of the largest lymph node (Correct Answer)
C. Fine needle aspiration cytology of a lymph node
D. Bone marrow biopsy
E. Flow cytometry on peripheral blood

Explanation: ***Excision biopsy of the largest lymph node*** - An **excision biopsy** is the **gold standard** for diagnosing lymphoma as it preserves the **tissue architecture**, which is critical for accurate classification of Hodgkin and Non-Hodgkin lymphoma subtypes. - The patient's presentation with **B symptoms** (weight loss, night sweats, fatigue), anemia, elevated LDH, and generalized lymphadenopathy necessitates a definitive tissue diagnosis, and a full node provides ample material for **histopathology**, **immunohistochemistry**, and molecular studies. *CT chest, abdomen and pelvis with contrast* - This imaging is primarily used for **staging** the extent of disease once a lymphoma diagnosis has been histologically confirmed, rather than for establishing the initial diagnosis itself. - While it helps delineate the size and distribution of lymphadenopathy and potential organ involvement, it cannot provide the **tissue confirmation** required to identify the specific type of lymphoma. *Fine needle aspiration cytology of a lymph node* - **Fine needle aspiration (FNA)** only provides a cytologic sample and **loses the crucial nodal architecture**, which is frequently essential for accurately diagnosing and subtyping lymphoma, leading to high rates of inconclusive results. - While it can sometimes differentiate between benign and malignant processes, it often lacks the specificity to classify lymphoma subtypes, which is vital for guiding appropriate treatment decisions. *Bone marrow biopsy* - A **bone marrow biopsy** is primarily indicated for **staging** lymphoma to assess for bone marrow involvement or to investigate unexplained cytopenias, rather than as the initial diagnostic procedure when accessible peripheral lymph nodes are present. - It is an important part of the complete workup but is not the most appropriate first step to establish the primary diagnosis of lymphoma from readily available abnormal lymph nodes. *Flow cytometry on peripheral blood* - **Flow cytometry on peripheral blood** is most valuable for diagnosing **leukemias** or conditions with significant circulating malignant cells, which is not the typical primary presentation for most nodal lymphomas. - While the patient exhibits mild lymphocytosis, the most direct and definitive diagnostic approach for suspected lymphoma originating in lymph nodes is to obtain tissue from the affected node.

Question 148: A 34-year-old woman presents with a 4-week history of fever up to 39°C, arthralgia affecting her hands and knees, and a rash on her trunk. She returned from hiking in the Scottish Highlands 6 weeks ago. Examination reveals temperature 38.6°C, multiple erythema migrans-like lesions, and swollen metacarpophalangeal joints. Blood tests show: WCC 9.8 × 10⁹/L, CRP 45 mg/L, negative blood cultures. Chest X-ray is normal. What is the most appropriate next step?

A. Start oral doxycycline and arrange Lyme serology (Correct Answer)
B. Start broad-spectrum antibiotics and arrange echocardiography
C. Arrange skin biopsy of the rash
D. Refer to rheumatology for suspected reactive arthritis
E. Arrange autoimmune screen including ANA and rheumatoid factor

Explanation: ***Start oral doxycycline and arrange Lyme serology***- The clinical presentation with **fever**, **arthralgia**, and crucially, **multiple erythema migrans-like lesions** after hiking in the **Scottish Highlands** (an endemic area for ticks) is highly suggestive of **disseminated early Lyme disease**.- **Oral doxycycline** is the first-line treatment for early Lyme disease, including disseminated forms, and should be initiated promptly to prevent further progression; **Lyme serology** (e.g., ELISA confirmed by Western blot) is appropriate for diagnosis confirmation.*Start broad-spectrum antibiotics and arrange echocardiography*- While a systemic infection is suspected, the presence of **erythema migrans-like lesions** strongly points away from **infective endocarditis** as the primary diagnosis.- **Echocardiography** would only be indicated if there were specific signs of cardiac involvement, such as new murmurs, chest pain, or conduction abnormalities, which are not described.*Arrange skin biopsy of the rash*- **Erythema migrans** is primarily a **clinical diagnosis**, and a skin biopsy is generally not required and can delay appropriate treatment.- Delaying the initiation of **antibiotic therapy** to perform an invasive procedure like a biopsy is not recommended, as prompt treatment is crucial to prevent chronic complications of Lyme disease.*Refer to rheumatology for suspected reactive arthritis*- **Reactive arthritis** typically presents with an **asymmetric oligoarthritis**, often involving lower extremities, and usually follows **gastrointestinal** or **genitourinary infections**, not typically associated with **erythema migrans** or tick exposure.- While arthralgia is present, the widespread rash and epidemiological link to tick exposure are not characteristic of reactive arthritis.*Arrange autoimmune screen including ANA and rheumatoid factor*- Although **fever** and **arthralgia** can be features of **autoimmune conditions** like rheumatoid arthritis or systemic lupus erythematosus, the presence of **erythema migrans-like lesions** makes an autoimmune process less likely as the primary cause.- Investigating for an infectious etiology like **Lyme disease** based on the distinctive rash and exposure history should precede or accompany an autoimmune workup, as treating the infection is paramount.

Question 149: According to NICE guidelines, which of the following time frames defines a fever as 'fever of unknown origin' (FUO) requiring systematic investigation?

A. Fever >38.0°C for more than 1 week without diagnosis despite initial investigation
B. Fever >37.8°C for more than 2 weeks with negative blood cultures
C. Fever >38.5°C for more than 10 days without identified source on clinical examination
D. Fever >38.3°C for more than 3 weeks without diagnosis despite appropriate investigation (Correct Answer)
E. Fever >38.0°C for more than 4 weeks despite hospital investigation

Explanation: ***Fever >38.3°C for more than 3 weeks without diagnosis despite appropriate investigation*** - This definition aligns with the **classic Petersdorf and Beeson criteria** for **fever of unknown origin (FUO)**. - It specifies a temperature of **>38.3°C (101°F)** on several occasions, a duration of more than **3 weeks**, and no diagnosis despite **appropriate investigations**. *Fever >38.0°C for more than 1 week without diagnosis despite initial investigation* - A duration of **1 week** is generally too short to classify as FUO, as many common viral infections can cause fever for this period. - The temperature threshold of **>38.0°C** is lower than the **>38.3°C** typically required for a formal FUO diagnosis. *Fever >37.8°C for more than 2 weeks with negative blood cultures* - The temperature of **>37.8°C** is below the standard **>38.3°C** threshold for defining FUO. - While **negative blood cultures** are important, the duration of **2 weeks** is shorter than the **3 weeks** required by most FUO definitions. *Fever >38.5°C for more than 10 days without identified source on clinical examination* - A duration of **10 days** is insufficient for an FUO diagnosis; the standard requires at least **3 weeks**. - The definition of FUO requires failed diagnosis despite **appropriate investigations**, not just clinical examination. *Fever >38.0°C for more than 4 weeks despite hospital investigation* - While a duration of **4 weeks** exceeds the 3-week threshold, the temperature criterion of **>38.0°C** is less specific than the **>38.3°C** generally accepted for FUO. - The **3-week** duration is the established minimum for triggering a systematic FUO workup, making longer durations simply inclusive of the criteria.

Question 150: A 70-year-old woman presents with a 3-month history of progressive fatigue, loss of appetite, and 9kg unintentional weight loss. She reports vague abdominal discomfort and early satiety. She has a history of hypertension. Examination reveals a palpable epigastric mass and shifting dullness suggestive of ascites. Blood tests show: Hb 108 g/L, albumin 28 g/L, CA-125 485 U/mL. What is the most likely diagnosis?

A. Gastric carcinoma
B. Peritoneal tuberculosis
C. Ovarian carcinoma (Correct Answer)
D. Pancreatic carcinoma
E. Hepatocellular carcinoma

Explanation: ***Ovarian carcinoma***- The patient's presentation of **progressive fatigue**, **weight loss**, **abdominal discomfort**, **early satiety**, **ascites**, and a **palpable epigastric mass** in a 70-year-old woman is highly suggestive of advanced malignancy. - A significantly elevated **CA-125 (485 U/mL)** in this clinical context, especially with signs of peritoneal involvement like ascites and a mass, is a strong indicator of **epithelial ovarian carcinoma**.*Gastric carcinoma*- While **weight loss**, **early satiety**, and an **epigastric mass** can be features of gastric carcinoma, the markedly high **CA-125** is not its primary tumor marker, making it less specific.- The presence of **ascites** with such a high CA-125 in a postmenopausal woman points more strongly to **peritoneal carcinomatosis** of ovarian origin rather than a primary gastric tumor.*Peritoneal tuberculosis*- This condition can mimic malignancy with **ascites**, **weight loss**, and elevated **CA-125**, but it usually presents with systemic symptoms like **fever**, **night sweats**, and often a history of exposure.- The presence of a distinct **palpable epigastric mass** is less typical for peritoneal tuberculosis, which more commonly causes diffuse peritoneal involvement or lymphadenopathy.*Pancreatic carcinoma*- While it can cause **weight loss**, **abdominal discomfort**, and a mass, it frequently presents with **obstructive jaundice**, back pain, or new-onset diabetes, which are not mentioned here.- The primary tumor marker for pancreatic cancer is **CA 19-9**, and while CA-125 can be elevated, it is not typically the prominent marker in such a high range without other specific pancreatic symptoms.*Hepatocellular carcinoma*- This cancer typically develops in the setting of **chronic liver disease** or cirrhosis and is primarily associated with elevated **Alpha-Fetoprotein (AFP)**.- Although it can cause **ascites** and an abdominal mass, the absence of liver disease risk factors and the highly elevated **CA-125** make it less likely than ovarian carcinoma.

Question 151: A 48-year-old woman presents with a 10-week history of fatigue and generalized aches. She reports difficulty climbing stairs and brushing her hair. She denies rash or Raynaud's phenomenon. Examination reveals proximal muscle weakness in both upper and lower limbs with normal distal strength. Blood tests show: CK 2,850 U/L (normal 25-200), ALT 78 U/L, ESR 42 mm/hr. What is the most likely diagnosis?

A. Polymyalgia rheumatica
B. Polymyositis (Correct Answer)
C. Drug-induced myopathy
D. Hypothyroid myopathy
E. Inclusion body myositis

Explanation: ***Polymyositis***- Characterized by subacute onset of symmetrical **proximal muscle weakness** (e.g., difficulty climbing stairs or brushing hair) and is associated with a significantly **elevated Creatine Kinase (CK)**.- The absence of skin findings like a heliotrope rash or Gottron papules distinguishes it from **dermatomyositis**, while the presence of true muscle weakness and high enzymes points specifically to an inflammatory myopathy.*Polymyalgia rheumatica*- Presents primarily with **pain and stiffness** in the shoulder and pelvic girdles rather than objective **muscle weakness** on examination.- While the **ESR** is typically elevated, the **Creatine Kinase (CK)** levels remain within the normal range in this condition.*Drug-induced myopathy*- Commonly associated with medications such as **statins**, but usually correlates with recent drug initiation or dosage increases.- While it causes **elevated CK**, the clinical presentation here is highly characteristic of an autoimmune **inflammatory myositis**.*Hypothyroid myopathy*- Can cause proximal weakness and **elevated CK**, but often presents with other systemic features like **bradycardia**, weight gain, or delayed reflexes.- The markedly elevated **ESR** (42 mm/hr) seen here is much more suggestive of an **inflammatory process** like polymyositis.*Inclusion body myositis*- Typically develops in older patients (usually >50 years) and presents with a more **insidious progression** over years rather than weeks.- Frequently involves **asymmetric weakness** and early involvement of **distal muscles**, specifically the finger flexors and quadriceps.

Question 152: A 62-year-old man presents with a 5-week history of fever ranging from 37.8°C to 38.5°C, night sweats, and 4kg weight loss. He recently returned from visiting family in India 3 months ago. He has type 2 diabetes controlled on metformin. Examination reveals temperature 38.2°C, no rashes, clear chest, and no lymphadenopathy. Initial blood tests show: Hb 118 g/L, WCC 11.2 × 10⁹/L, CRP 85 mg/L, normal renal and liver function. Chest X-ray and urine culture are normal. What is the most important next investigation?

A. Blood cultures and echocardiography
B. CT chest, abdomen and pelvis
C. Interferon-gamma release assay (IGRA) for tuberculosis (Correct Answer)
D. HIV serology
E. Bone marrow biopsy

Explanation: ***Interferon-gamma release assay (IGRA) for tuberculosis*** - The patient's presentation with **fever of unknown origin**, constitutional symptoms (weight loss, night sweats), and a recent travel history to **India**, a region highly endemic for **Tuberculosis (TB)**, makes TB a strong diagnostic possibility. - An **IGRA** is a highly sensitive and specific blood test for latent or active TB infection, crucial when **extrapulmonary TB** or **miliary TB** is suspected, especially since his **chest X-ray** is normal. *Blood cultures and echocardiography* - These investigations are primarily used to diagnose **infective endocarditis (IE)**, which is less likely given the absence of a heart murmur, new valvular disease, or peripheral stigmata of IE. - While blood cultures are part of a general **fever of unknown origin (FUO)** workup, the strong epidemiological link to India points more specifically towards TB as the leading differential. *CT chest, abdomen and pelvis* - This imaging study is useful for localizing occult infections, inflammation, or malignancies, which could cause **FUO**, but it is typically performed after targeted infectious disease testing. - While it might reveal **lymphadenopathy** or granulomas, an **IGRA** directly tests for TB infection, which is highly suspected based on the patient's history. *HIV serology* - **HIV infection** can cause chronic fever and constitutional symptoms and predispose individuals to various opportunistic infections, including TB. - However, given the strong epidemiological link to **India** and the typical clinical presentation, **TB** is a more immediately probable and treatable cause of the current symptoms, making IGRA a more targeted initial step. *Bone marrow biopsy* - This is an invasive procedure generally reserved for diagnosing hematological malignancies, **miliary TB**, or other disseminated infections (e.g., fungal, leishmaniasis) when less invasive tests are inconclusive. - It is not a first-line investigation in the initial workup for **fever of unknown origin**, especially when a strong infectious suspicion like TB can be screened for with a simpler blood test like IGRA.

Question 153: A 40-year-old office worker presents with a 4-month history of fatigue and difficulty concentrating. She reports sleeping 8-9 hours nightly but waking unrefreshed. She has gained 5kg despite no change in diet. Her periods are regular. She denies low mood but admits to feeling 'stressed' at work. Examination is unremarkable except for BMI 29 kg/m². Blood tests show: Hb 138 g/L, TSH 6.8 mU/L (normal 0.5-4.5), free T4 11 pmol/L (normal 10-22). What is the most appropriate management?

A. Refer to endocrinology
B. Repeat thyroid function tests in 3 months
C. Start levothyroxine 50 micrograms daily
D. Check thyroid peroxidase antibodies (Correct Answer)
E. Advise lifestyle modification and reassess in 6 weeks

Explanation: ***Check thyroid peroxidase antibodies*** - The patient presents with **subclinical hypothyroidism**, indicated by an **elevated TSH** (6.8 mU/L) and **normal free T4**, accompanied by symptoms like fatigue and weight gain. - Checking **thyroid peroxidase (TPO) antibodies** is crucial to ascertain if the condition is autoimmune (Hashimoto's thyroiditis), which strongly predicts progression to **overt hypothyroidism** and influences the decision to initiate **levothyroxine** therapy.*Refer to endocrinology* - Most cases of **subclinical hypothyroidism** with TSH <10 mU/L are managed in **primary care**, especially without severe symptoms or a **goiter**. - Referral to endocrinology is typically reserved for **TSH levels >10 mU/L** (or >20 mU/L depending on local guidelines), pregnancy, or complex presentations, which are not present here.*Repeat thyroid function tests in 3 months* - While repeat testing is appropriate for monitoring, it is not the immediate first step in a symptomatic patient with newly diagnosed **subclinical hypothyroidism**. - Identifying the **etiology** (e.g., autoimmune thyroiditis via **TPO antibodies**) is often recommended before merely retesting, as it guides long-term management and prognosis.*Start levothyroxine 50 micrograms daily* - Starting **levothyroxine** for **subclinical hypothyroidism** (TSH <10 mU/L) is generally considered after assessing **TPO antibody status** and persistent symptoms, as evidence for benefit is stronger with positive antibodies. - Without knowing the **autoimmune status**, empirical treatment might be premature, and a more conservative approach often involves confirming the etiology first.*Advise lifestyle modification and reassess in 6 weeks* - While beneficial for overall health and weight, **lifestyle modification** alone will not correct the **thyroid dysfunction** (elevated TSH) and is not the primary treatment for hypothyroidism. - Reassessing thyroid function typically occurs after **3 months** to allow for stabilization and to confirm persistence, not as early as 6 weeks.

Question 154: A 55-year-old woman presents with a 3-month history of unintentional weight loss of 8kg and persistent fatigue. She reports intermittent loose stools but no rectal bleeding. She has a 30 pack-year smoking history. Examination reveals mild conjunctival pallor and a palpable left supraclavicular lymph node. Blood tests show Hb 102 g/L (normal 115-165), MCV 78 fL, and normal thyroid function. What is the most appropriate next investigation?

A. Fine needle aspiration of the lymph node (Correct Answer)
B. Urgent chest X-ray
C. Colonoscopy within 2 weeks
D. CT chest, abdomen and pelvis
E. Upper gastrointestinal endoscopy within 2 weeks

Explanation: ***Fine needle aspiration of the lymph node*** - A palpable **left supraclavicular lymph node (Virchow’s node)** in a patient with **unexplained weight loss** and **microcytic anemia** is highly suspicious for metastatic malignancy, often originating from **thoracic or abdominal primary sites**. - **Fine needle aspiration (FNA)** or biopsy of this easily accessible node is the most appropriate next step to obtain a **histological diagnosis**, which is crucial for confirming malignancy and guiding further management. *Urgent chest X-ray* - While the patient has a significant **smoking history**, a chest X-ray has limited sensitivity for detecting small primary tumors and will not provide the **histological diagnosis** needed from the palpable node. - This investigation might miss **sub-diaphragmatic pathologies** or small primary lesions that are better evaluated through other means after tissue confirmation. *Colonoscopy within 2 weeks* - **Loose stools** and **microcytic anemia** are suggestive of **gastrointestinal blood loss** and potentially a **right-sided colonic malignancy**. - However, investigating a specific primary site without first obtaining a **tissue diagnosis** from the readily accessible **Virchow's node** is less efficient and could delay the definitive diagnosis, as the primary could be elsewhere. *CT chest, abdomen and pelvis* - **CT imaging** is essential for **staging** a confirmed malignancy and attempting to locate the **primary tumor**, providing a roadmap for further investigation. - However, it does not provide the **histological confirmation** of malignancy, which is the immediate priority to guide treatment decisions and is best obtained from the palpable node. *Upper gastrointestinal endoscopy within 2 weeks* - A **Virchow’s node** is classically associated with **gastric cancer** (Troisier's sign), making an upper GI endoscopy a relevant consideration for a primary source. - Like colonoscopy, performing this invasive procedure before obtaining a **histological diagnosis** from the accessible **lymph node aspiration** might delay the overall diagnostic process for the confirmed malignancy.

Question 155: A 44-year-old woman presents with a 12-week history of profound fatigue, difficulty concentrating, and 4kg weight loss. She works as a teacher and reports finding it increasingly difficult to cope with work. She has intermittent low-grade fevers. Examination is unremarkable. Initial blood tests show: Hb 132 g/L, WCC 4.8 × 10⁹/L, platelets 245 × 10⁹/L, ESR 8 mm/hr, CRP <5 mg/L, normal thyroid function, liver function, and renal function. What factor in this presentation would most strongly suggest an underlying organic cause rather than a primary psychological cause?

A. The unintentional weight loss of 4kg (Correct Answer)
B. The intermittent low-grade fevers
C. The profound fatigue lasting 12 weeks
D. The normal inflammatory markers
E. The difficulty concentrating

Explanation: ***The unintentional weight loss of 4kg*** - **Unintentional weight loss** is a significant **red flag** feature that strongly suggests an underlying **organic pathology**, such as malignancy, chronic infection, or metabolic disorders. - A quantifiable loss of 4kg within a relatively short timeframe, especially when unintended, is a more compelling indicator of a physical disease process than many symptoms that can be psychosomatic. *The intermittent low-grade fevers* - **Low-grade fevers** can be subjective or intermittently present in various conditions, including some psychological states or functional syndromes, and are often non-specific without objective documentation. - While fevers can indicate infection or inflammation, they are less definitive than documented unintentional weight loss in strongly distinguishing an organic from a psychological cause in this context. *The profound fatigue lasting 12 weeks* - **Chronic fatigue** is a hallmark symptom of many **psychological conditions**, such as depression and anxiety disorders, and is also central to **functional syndromes** like Chronic Fatigue Syndrome. - Although fatigue can be a symptom of numerous organic diseases, its duration alone is not a strong discriminator for an organic cause due to its high prevalence in mental health conditions. *The normal inflammatory markers* - **Normal ESR and CRP** levels indicate the absence of significant acute inflammation, which tends to make acute infectious or active inflammatory diseases less likely. - This finding is often consistent with **psychological causes** or **functional syndromes** where systemic inflammation is not a primary feature, rather than strongly suggesting an organic pathology. *The difficulty concentrating* - **Difficulty concentrating**, often described as "brain fog," is a very common symptom in both **psychological disorders** (e.g., depression, anxiety, stress) and **sleep disturbances**. - This symptom is highly non-specific and frequently overlaps between psychological distress and various organic conditions, making it a poor sole indicator for an organic cause.

Question 156: A 29-year-old woman presents with widespread pain affecting her neck, shoulders, back, and legs for 8 months. She describes the pain as constant and aching, with no clear precipitating factors. She also reports poor sleep, fatigue, and difficulty concentrating. Examination reveals multiple tender points but no joint swelling or objective weakness. Blood tests including FBC, CRP, ESR, thyroid function, and vitamin D are all normal. What is the most appropriate management approach?

A. Explain the likely diagnosis of fibromyalgia, discuss management strategies including graded exercise and CBT, and consider amitriptyline (Correct Answer)
B. Refer to rheumatology under 2-week wait pathway
C. Arrange MRI spine to exclude structural pathology
D. Prescribe prednisolone 20mg daily for 2 weeks
E. Prescribe morphine sulfate modified-release for pain management

Explanation: ***Explain the likely diagnosis of fibromyalgia, discuss management strategies including graded exercise and CBT, and consider amitriptyline*** - This patient displays the classic triad of **fibromyalgia**: chronic widespread pain, **fatigue**, and **sleep disturbance** with normal inflammatory markers (**ESR/CRP**). - Management focuses on a **multidisciplinary approach** including patient education, **Cognitive Behavioral Therapy (CBT)**, and low-dose **tricyclic antidepressants** like amitriptyline to improve sleep architecture. *Refer to rheumatology under 2-week wait pathway* - A **2-week wait (urgent)** referral is reserved for suspected **malignancy** or rapidly progressive inflammatory conditions, which are not suggested by normal blood tests. - Fibromyalgia is a clinical diagnosis that should ideally be managed in **primary care** once inflammatory mimics are excluded. *Arrange MRI spine to exclude structural pathology* - MRI is not indicated as the pain is **widespread (systemic)** rather than localized to a specific dermatome or spinal segment. - Ordering imaging for chronic widespread pain often reveals **incidental findings** that can lead to unnecessary anxiety and medicalization. *Prescribe prednisolone 20mg daily for 2 weeks* - **Corticosteroids** are used for inflammatory conditions like **Polymyalgia Rheumatica (PMR)**, which is unlikely given the patient's young age and **normal ESR/CRP**. - Steroids have no role in the pathophysiology of **fibromyalgia** and carry significant side effects with no clinical benefit in this context. *Prescribe morphine sulfate modified-release for pain management* - **Opioids** are explicitly not recommended for fibromyalgia because they are largely **ineffective** for central sensitization pain. - Long-term use of strong opioids carries a high risk of **dependence**, addiction, and **opioid-induced hyperalgesia**.

Question 157: A 65-year-old man with advanced COPD presents with worsening breathlessness and chest tightness. He describes the breathlessness as severely limiting his daily activities. He is already on maximum inhaler therapy. On examination, oxygen saturations are 89% on air, respiratory rate 22/min. Which pain and symptom assessment tool would be most appropriate to assess his symptom burden and guide management?

A. McGill Pain Questionnaire
B. Numeric Rating Scale (NRS) for pain
C. Edmonton Symptom Assessment System (ESAS) (Correct Answer)
D. Brief Pain Inventory (BPI)
E. Visual Analogue Scale (VAS) for pain

Explanation: ***Edmonton Symptom Assessment System (ESAS)*** - The **ESAS** is a validated multidimensional tool that assesses nine common symptoms, including **breathlessness**, pain, and anxiety, making it ideal for the holistic management of **advanced COPD**. - It allows clinicians to monitor the **total symptom burden** over time and is particularly useful in **palliative care** settings to guide complex symptom management beyond just pain. *McGill Pain Questionnaire* - This tool is specifically designed to evaluate the **quality and intensity of pain** using descriptive adjectives, which is not the primary concern for this patient whose main issue is breathlessness. - It lacks the components to assess **respiratory distress** or other non-pain symptoms associated with chronic lung disease like **fatigue** or **anxiety**. *Numeric Rating Scale (NRS) for pain* - The **NRS** is a unidimensional scale focusing exclusively on **pain intensity** on a 0–10 scale. - It is insufficient for this patient because it cannot capture the severity of **dyspnea** or the functional impact of his COPD, nor other associated symptoms. *Brief Pain Inventory (BPI)* - The **BPI** primarily assesses the **severity of pain** and its impact on daily functions; it is not designed to measure **respiratory symptoms**. - While it helps in understanding disability related to pain, it ignores the **multidimensional symptom profile** required for advanced chronic disease management. *Visual Analogue Scale (VAS) for pain* - The **VAS** is a subjective scale used to measure **pain intensity** along a continuous line, which is too narrow for a patient with multiple systemic symptoms like severe breathlessness. - It does not provide data on **breathlessness**, tiredness, or psychological well-being, which are critical for guiding therapy in **advanced COPD**.

Question 158: A 33-year-old man presents with a 5-day history of severe right-sided abdominal pain. He describes the pain as constant, scoring it 8/10 in intensity. He has had multiple previous attendances for various pains and has requested strong painkillers. Examination reveals tenderness in the right upper quadrant but no guarding or rebound. Vital signs are normal. Blood tests including FBC, CRP, liver function, and amylase are all normal. Urinalysis is normal. What is the most appropriate next step in management?

A. Prescribe codeine phosphate 30mg four times daily and review in 1 week
B. Arrange urgent ultrasound abdomen and review with results (Correct Answer)
C. Explain the normal investigation results, offer simple analgesia, and arrange follow-up to reassess
D. Refer to general surgery for same-day assessment
E. Arrange urgent CT abdomen and pelvis

Explanation: ***Arrange urgent ultrasound abdomen and review with results*** - The patient presents with severe, persistent right upper quadrant pain, which, despite normal blood tests and stable vital signs, necessitates investigation to rule out organic pathology such as **biliary colic** or **cholecystitis**. - An **abdominal ultrasound** is the gold-standard first-line imaging for the hepatobiliary system, highly effective for detecting **gallstones** and assessing the gallbladder, with no radiation exposure. *Prescribe codeine phosphate 30mg four times daily and review in 1 week* - Initiating potent **opioid analgesia** without a definitive diagnosis, especially with a history of frequent attendances for pain and requests for strong painkillers, is inappropriate and risks **masking symptoms**. - This approach fails to identify and treat the underlying cause of the pain and could reinforce potential **drug-seeking behavior**. *Explain the normal investigation results, offer simple analgesia, and arrange follow-up to reassess* - Despite normal blood tests, severe 8/10 right upper quadrant pain for 5 days cannot be dismissed without further diagnostic steps, particularly **imaging** to exclude structural causes. - Normal **vital signs** and inflammatory markers reduce the urgency but do not rule out conditions like **cholelithiasis** which can cause significant pain and require specific management. *Refer to general surgery for same-day assessment* - Emergency surgical referral is not indicated as the patient is **haemodynamically stable** and lacks signs of **peritonitis** (no guarding or rebound tenderness). - In the absence of acute complications, initial diagnostic workup including imaging should be completed before a surgical consult, which might then be appropriate based on findings. *Arrange urgent CT abdomen and pelvis* - **CT imaging** involves significant ionising radiation and is less sensitive than ultrasound for detecting **gallstones** or evaluating the biliary tree. - CT is typically reserved for suspected complications such as **perforation**, appendicitis, or when ultrasound findings are inconclusive.

Question 159: A 76-year-old woman presents with a 3-month history of fatigue, 6kg weight loss, and jaw pain when chewing. She also reports a dull headache over her right temple and some scalp tenderness when brushing her hair. Blood tests show: Hb 105 g/L, WCC 8.5 × 10⁹/L, platelets 425 × 10⁹/L, ESR 94 mm/hr, CRP 68 mg/L. What is the most appropriate immediate management?

A. Start prednisolone 60mg daily immediately and arrange urgent temporal artery biopsy (Correct Answer)
B. Arrange urgent temporal artery ultrasound before starting treatment
C. Refer urgently to ophthalmology for assessment
D. Arrange urgent temporal artery biopsy before starting treatment
E. Start prednisolone 15mg daily and review in 1 week

Explanation: ***Start prednisolone 60mg daily immediately and arrange urgent temporal artery biopsy*** - The patient's symptoms including **jaw claudication**, **temporal headache**, **scalp tenderness**, and significantly elevated **ESR and CRP** are classic for **Giant Cell Arteritis (GCA)**. - Immediate high-dose **corticosteroid therapy** (e.g., prednisolone 60mg daily) is crucial to prevent irreversible **vision loss**, which is an urgent complication, while the biopsy can be performed within 7-14 days. *Arrange urgent temporal artery ultrasound before starting treatment* - While a **temporal artery ultrasound** revealing a 'halo sign' can support the diagnosis, it should never **delay the immediate initiation of steroids** in suspected GCA due to the risk of permanent blindness. - Diagnostic imaging and biopsy should ideally be performed urgently but concurrently with or after starting treatment. *Refer urgently to ophthalmology for assessment* - An **ophthalmology referral** is important, especially if visual symptoms are present or developing, but it is not the primary immediate management step in GCA. - The critical first step is to administer **high-dose systemic steroids** to protect the optic nerve from ischemia and prevent permanent visual impairment. *Arrange urgent temporal artery biopsy before starting treatment* - Delaying **steroid treatment** to wait for a **temporal artery biopsy (TAB)** is incorrect and dangerous, significantly increasing the risk of severe ischemic complications like **stroke or blindness**. - The characteristic histological changes of vasculitis in the temporal artery persist for at least 1 to 2 weeks after starting steroids, allowing the biopsy to be performed after treatment begins. *Start prednisolone 15mg daily and review in 1 week* - A daily dose of **15mg prednisolone** is typically appropriate for **Polymyalgia Rheumatica (PMR)**, which is a different condition although it can coexist with GCA. - This dose is **insufficient** to treat active GCA and prevent its severe complications, and waiting a week for review leaves a critical window open for **irreversible vision loss**.

Question 160: A 42-year-old woman presents with persistent lower back pain for 6 weeks. The pain is worse in the morning and improves with activity. She reports stiffness lasting over an hour each morning. She is otherwise well with no red flag symptoms. Examination shows reduced lumbar spine flexion. What is the most appropriate initial investigation to support the suspected diagnosis?

A. MRI lumbar spine
B. HLA-B27 testing and inflammatory markers (ESR, CRP) (Correct Answer)
C. Plain radiographs of sacroiliac joints and lumbar spine
D. Bone scan
E. CT lumbar spine

Explanation: ***HLA-B27 testing and inflammatory markers (ESR, CRP)*** - The patient's symptoms (persistent lower back pain, morning stiffness > 1 hour, improvement with activity) are highly characteristic of **inflammatory back pain**, suggesting a **spondyloarthropathy**. - Initial investigation with **HLA-B27** (a genetic marker) and **inflammatory markers** like **ESR** and **CRP** (indicating systemic inflammation) provides strong, cost-effective, and non-invasive evidence to support this suspected diagnosis. *MRI lumbar spine* - While **MRI** is highly sensitive for detecting **early sacroiliitis** (bone marrow edema) which is crucial for diagnosing axial spondyloarthritis, it is typically reserved as a **second-line investigation** after initial clinical and laboratory screening. - It is often more expensive and less readily available in primary care settings compared to blood tests, making it not the *most appropriate initial* step. *Plain radiographs of sacroiliac joints and lumbar spine* - **Plain radiographs** often appear **normal in early stages** of spondyloarthropathies, as bony changes like erosions, sclerosis, or fusion (sacroiliitis) can take years to become evident. - For symptoms present for only 6 weeks, X-rays lack the sensitivity to detect acute inflammation and would likely yield a false negative result. *Bone scan* - A **bone scan** (scintigraphy) is highly sensitive to increased bone turnover but is **non-specific**, meaning it cannot differentiate well between various causes of increased uptake such as infection, malignancy, or different types of inflammation. - It is not a standard or appropriate initial investigation for suspected inflammatory back pain due to its low specificity in this context. *CT lumbar spine* - **CT scans** provide excellent detail of bone but involve significant **ionizing radiation** and are less effective than MRI for visualizing early soft tissue or bone marrow inflammation characteristic of spondyloarthropathies. - It is generally not used as an initial diagnostic tool for inflammatory back pain and is more suited for evaluating advanced bony changes or complex anatomical issues.

Question 161: Which of the following features would classify a fever of unknown origin (FUO) according to classical diagnostic criteria?

A. Temperature >38.3°C on several occasions, duration >3 weeks, no diagnosis after 3 outpatient visits or 3 days of hospital investigation (Correct Answer)
B. Temperature >37.8°C on several occasions, duration >2 weeks, no diagnosis after appropriate investigation
C. Temperature >38.5°C on several occasions, duration >4 weeks, no diagnosis after 1 week of hospital investigation
D. Temperature >38.3°C continuously for >2 weeks, no diagnosis after appropriate investigation including CT imaging
E. Temperature >38.0°C continuously for >1 week, no diagnosis after initial blood tests and chest X-ray

Explanation: ***Temperature >38.3°C on several occasions, duration >3 weeks, no diagnosis after 3 outpatient visits or 3 days of hospital investigation***- The classical definition of **Fever of Unknown Origin (FUO)**, established by Petersdorf and Beeson, precisely states a temperature of **>38.3°C (101°F)** on several occasions.- This definition also requires a prolonged duration of **more than 3 weeks** and a thorough diagnostic work-up without a diagnosis after **3 outpatient visits** or **3 days of hospital investigation*.*Temperature >37.8°C on several occasions, duration >2 weeks, no diagnosis after appropriate investigation*- The temperature threshold of **>37.8°C** is too low; the classical definition specifically requires **>38.3°C**.- A duration of **>2 weeks** is also insufficient, as the classical criteria mandate a fever lasting for **>3 weeks*.*Temperature >38.5°C on several occasions, duration >4 weeks, no diagnosis after 1 week of hospital investigation*- While **>38.5°C** is a significant fever, it is not the exact **>38.3°C** specified in the classical FUO definition.- The investigation period specified as **1 week of hospital investigation** is inconsistent with the classical criteria of **3 days of hospital investigation** or 3 outpatient visits*.*Temperature >38.3°C continuously for >2 weeks, no diagnosis after appropriate investigation including CT imaging*- The classical definition requires fever on **several occasions**, not necessarily continuously, distinguishing it from persistent fever patterns.- A duration of **>2 weeks** is insufficient; the classical criteria require the fever to last for **>3 weeks*.*Temperature >38.0°C continuously for >1 week, no diagnosis after initial blood tests and chest X-ray*- The temperature threshold of **>38.0°C** is not precise enough for the classical definition, which specifies **>38.3°C**.- A duration of **>1 week** is significantly shorter than the **>3 weeks** required by the classical FUO criteria, and initial tests do not meet the work-up duration.

Question 162: A 58-year-old man presents with a 2-week history of fever (up to 38.8°C), malaise, and a painful rash on his legs. He has a history of ulcerative colitis managed with mesalazine. Examination reveals tender, erythematous nodules on both shins. Blood tests show: Hb 118 g/L, WCC 11.2 × 10⁹/L, CRP 72 mg/L, ESR 68 mm/hr. Chest X-ray shows bilateral hilar lymphadenopathy. Which investigation would best establish the underlying diagnosis?

A. CT chest with contrast
B. Anti-neutrophil cytoplasmic antibodies (ANCA)
C. Serum angiotensin-converting enzyme (ACE) level (Correct Answer)
D. Skin biopsy of the leg lesions
E. Colonoscopy

Explanation: ***Serum angiotensin-converting enzyme (ACE) level*** - The patient presents with **Löfgren’s syndrome**, a classic triad of **erythema nodosum**, **bilateral hilar lymphadenopathy (BHL)**, and fever, which is a specific acute form of **sarcoidosis**. - Elevated **serum ACE** levels are found in approximately 60% of patients with active sarcoidosis and support the diagnosis when combined with characteristic radiographic and clinical findings. *CT chest with contrast* - While a CT can provide higher resolution of the **mediastinal and hilar lymphadenopathy**, it is not the most specific diagnostic tool when the CXR already clearly shows characteristic BHL. - Imaging alone helps visualize anatomical changes but does not offer the biochemical support for **sarcoidosis** activity that serum ACE provides in this constellation of symptoms. *Anti-neutrophil cytoplasmic antibodies (ANCA)* - **ANCA** testing is primarily used to screen for small-vessel **vasculitides** such as Granulomatosis with Polyangiitis, which typically involves the upper/lower respiratory tracts and kidneys. - The absence of renal symptoms, airway necrosis, or cavitating lung lesions makes vasculitis less likely than a sarcoid-related process. *Skin biopsy of the leg lesions* - A biopsy of **erythema nodosum** typically shows **septal panniculitis** without granulomas, which is a non-specific finding common to many triggers. - Since these skin lesions are a reactive manifestation rather than a primary site of the disease process, they do not provide the definitive underlying diagnosis of **sarcoidosis**. *Colonoscopy* - While **erythema nodosum** can be an extra-intestinal manifestation of **Ulcerative Colitis**, it does not explain the **bilateral hilar lymphadenopathy** found on the CXR. - A colonoscopy would assess the activity of the patient's known colitis but would fail to investigate the multi-system involvement suggested by the chest findings.

Question 163: A 52-year-old woman with rheumatoid arthritis presents with 4 weeks of fever (38-39°C), night sweats, and fatigue. She takes methotrexate 15mg weekly and has done so for 2 years without problems. Blood tests show: Hb 108 g/L, WCC 3.2 × 10⁹/L (neutrophils 1.1 × 10⁹/L), platelets 165 × 10⁹/L, CRP 85 mg/L. Chest X-ray shows patchy bilateral infiltrates. What is the most appropriate immediate management?

A. Admit to hospital immediately for investigation and management (Correct Answer)
B. Stop methotrexate and prescribe folic acid 5mg daily
C. Prescribe oral amoxicillin 500mg three times daily
D. Arrange outpatient CT chest and review in 1 week
E. Prescribe oral prednisolone 30mg daily and review in 48 hours

Explanation: ***Admit to hospital immediately for investigation and management*** - The patient presents with **neutropenic sepsis** (neutrophils <1.5 × 10⁹/L and fever) while on **immunosuppressive methotrexate**, which is a life-threatening medical emergency. - Immediate hospitalization is required for **intravenous antibiotics**, cultures, and monitoring of **pulmonary infiltrates**, which may represent severe infection or drug-induced **pneumonitis**. *Stop methotrexate and prescribe folic acid 5mg daily* - While **methotrexate** must be discontinued due to **bone marrow suppression**, this supportive measure alone does not address the acute risk of sepsis. - Folic acid is used for chronic side effects, whereas the urgent priority is treating the **neutropenia-associated infection**. *Prescribe oral amoxicillin 500mg three times daily* - **Oral antibiotics** are insufficient for a patient with systemic symptoms, **neutropenia**, and bilateral lung infiltrates who requires **broad-spectrum IV therapy**. - Amoxicillin does not provide adequate coverage for potential **atypical pathogens** or opportunistic infections like **Pneumocystis jirovecii**. *Arrange outpatient CT chest and review in 1 week* - Delaying care for an outpatient scan is dangerous given the high risk of rapid deterioration in **immunocompromised patients** with fever. - Diagnostic imaging and intervention must occur **emergently** in an inpatient setting to prevent further septic decline. *Prescribe oral prednisolone 30mg daily and review in 48 hours* - Starting **corticosteroids** empirically is contraindicated before excluding an active infection, as it could severely worsen **neutropenic sepsis**. - A 48-hour delay for review is inappropriate for a patient already showing signs of **hematologic toxicity** and systemic illness.

Question 164: A 35-year-old man presents with intermittent fevers up to 39°C over 3 weeks, associated with rigors and night sweats. He has no significant past medical history but mentions he had a dental procedure 4 weeks ago. On examination, temperature is 38.2°C, pulse 96/min regular, BP 128/76 mmHg. A grade 3/6 pansystolic murmur is heard at the apex. What is the single most important immediate investigation?

A. Echocardiography
B. Full blood count and inflammatory markers
C. Chest X-ray
D. Electrocardiogram
E. Three sets of blood cultures from different sites (Correct Answer)

Explanation: ***Three sets of blood cultures from different sites*** - Obtaining **blood cultures** prior to starting antibiotic therapy is the single most critical step in diagnosing **infective endocarditis** and identifying the causative pathogen. - Following the **Duke criteria**, three sets taken from separate venepuncture sites increase the sensitivity for detecting **continuous bacteremia**, which is a hallmark of this condition. *Echocardiography* - While **transthoracic or transoesophageal echocardiography** is a major diagnostic tool for visualizing **vegetations**, it does not identify the specific organism required for targeted therapy. - It should be performed urgently, but it follows blood cultures in the sequence of immediate management for suspected endocarditis. *Full blood count and inflammatory markers* - Elevated **WBC count**, **CRP**, and **ESR** are non-specific findings that support an underlying inflammatory or infectious process but do not confirm the diagnosis. - These tests help monitor the response to treatment but are not the primary diagnostic investigation for **endocarditis**. *Chest X-ray* - A **Chest X-ray** is useful for identifying secondary complications such as **pulmonary edema** or septic emboli in right-sided endocarditis. - It provides limited information regarding the direct cause of the patient's **fever and heart murmur**. *Electrocardiogram* - An **ECG** is important to check for **conduction abnormalities**, such as a prolonged PR interval, which may indicate a **root abscess**. - Although clinically significant for monitoring complications, it is not the definitive investigation for a patient presenting with high-grade fever and a new **pansystolic murmur**.

Question 165: A 28-year-old woman presents with a 6-week history of intermittent fevers up to 38.5°C, night sweats, and fatigue. She returned from a 3-month backpacking trip through Southeast Asia 8 weeks ago. Examination reveals no focal signs. Blood tests show: Hb 125 g/L, WCC 6.8 × 10⁹/L, platelets 285 × 10⁹/L, CRP 45 mg/L, normal liver and renal function. Malaria films are negative. Chest X-ray shows bilateral hilar lymphadenopathy. What is the most likely diagnosis?

A. Tuberculosis (Correct Answer)
B. Brucellosis
C. Sarcoidosis
D. Infectious mononucleosis
E. Lymphoma

Explanation: ***Tuberculosis***- Recent travel to a **high-prevalence region** (Southeast Asia) coupled with prolonged **constitutional symptoms** (fever, night sweats, fatigue) strongly suggests active **Mycobacterium tuberculosis** infection.- The presence of **bilateral hilar lymphadenopathy (BHL)** on chest X-ray, in the context of a travel history from an endemic area and constitutional symptoms, is a recognized presentation of primary or reactivated **tuberculosis**.*Brucellosis*- This infection is primarily acquired through contact with **infected animals** or consumption of **unpasteurized dairy products**, which is not explicitly mentioned in the patient's travel.- While brucellosis can cause intermittent fever and constitutional symptoms, **bilateral hilar lymphadenopathy** is not a characteristic imaging finding for this disease.*Sarcoidosis*- While **bilateral hilar lymphadenopathy** is a hallmark of sarcoidosis, the presence of **high-grade fever (38.5°C)** and significant **night sweats** makes it less likely, as sarcoidosis often presents with milder or no systemic symptoms initially.- Given the patient's recent travel to an **endemic area**, an infectious etiology like tuberculosis must be thoroughly excluded before considering a diagnosis of sarcoidosis.*Infectious mononucleosis*- Typically presents with symptoms like **pharyngitis**, profound fatigue, and diffuse **lymphadenopathy** (especially cervical and axillary), often accompanied by splenomegaly.- **Isolated bilateral hilar lymphadenopathy** without other prominent features like pharyngitis, and a symptom duration of **6 weeks**, is an atypical presentation for infectious mononucleosis.*Lymphoma*- Lymphoma can cause **B-symptoms** (fever, night sweats, fatigue) and **lymphadenopathy**, including hilar involvement.- However, hilar lymphadenopathy in lymphoma is often more **bulky or asymmetric**, and given the strong epidemiological link to **tuberculosis** through recent travel to Southeast Asia, an infectious cause is a more immediate concern.

Question 166: A 72-year-old man presents with a 6-week history of progressive fatigue and 7kg unintentional weight loss. He is a lifelong smoker of 40 pack-years. Examination reveals mild pallor and a palpable left supraclavicular lymph node measuring approximately 2cm. Blood tests show Hb 102 g/L (MCV 88 fL), WCC 8.1 × 10⁹/L, platelets 385 × 10⁹/L. What is the most appropriate immediate management?

A. Arrange urgent CT chest and refer to respiratory medicine (Correct Answer)
B. Perform excision biopsy of the lymph node in primary care
C. Commence oral iron supplementation and review in 2 weeks
D. Arrange ultrasound-guided fine needle aspiration of the lymph node
E. Refer urgently to haematology under 2-week wait pathway

Explanation: ***Arrange urgent CT chest and refer to respiratory medicine***- The patient's presentation with a **40 pack-year smoking history**, progressive fatigue, significant **unintentional weight loss**, normocytic anemia, and a palpable **left supraclavicular lymph node** (Virchow's node) are classic **red flag features** highly suggestive of an underlying malignancy, most commonly **lung cancer** given the extensive smoking history. - Urgent **CT chest** is essential to evaluate the primary tumor and assess for metastatic disease, while referral to **respiratory medicine** ensures a prompt and specialized diagnostic and management pathway. *Perform excision biopsy of the lymph node in primary care*- **Excision biopsy** for suspected malignancy should not be performed in primary care; it requires a sterile environment and specialized surgical and pathological expertise. - Prioritizing a localized biopsy over comprehensive imaging could significantly delay the diagnosis and staging of a potentially advanced **thoracic or abdominal primary tumor**. *Commence oral iron supplementation and review in 2 weeks*- The patient has **normocytic anemia** (MCV 88 fL), making iron deficiency less likely as the primary cause; it is more consistent with **anemia of chronic disease** often associated with malignancy. - Simply treating the anemia symptomatically without investigating the underlying **red flag symptoms** would dangerously delay the diagnosis of a suspected high-grade malignancy. *Arrange ultrasound-guided fine needle aspiration of the lymph node*- While **fine needle aspiration (FNA)** can be diagnostic, it often provides insufficient tissue for comprehensive histological assessment compared to core or excision biopsy and does not replace the critical need for **cross-sectional imaging** to stage the primary tumor. - Arranging only an FNA in primary care as the immediate step would delay the broader staging and multidisciplinary management required for suspected **metastatic cancer**. *Refer urgently to haematology under 2-week wait pathway*- Although lymphadenopathy and anemia can be associated with **haematological malignancies**, the patient's profound **smoking history** and the specific finding of a **Virchow's node** (implying metastasis from a solid organ primary, frequently lung or gastrointestinal) point more strongly towards a **solid tumor**. - Referral to **respiratory medicine** is the more appropriate initial step for a lifelong smoker with these constitutional symptoms to investigate for a primary lung pathology first.

Question 167: A 45-year-old woman presents with a 3-month history of persistent fatigue and a 5kg weight loss. She reports feeling generally unwell with poor appetite. Blood tests show: Hb 118 g/L, WCC 7.2 × 10⁹/L, platelets 245 × 10⁹/L, ESR 52 mm/hr, CRP 28 mg/L, normal renal and liver function, TSH 2.8 mU/L, HbA1c 38 mmol/mol. Chest X-ray is normal. What is the most appropriate next step in management?

A. Reassure and review in 3 months
B. Refer urgently to haematology under 2-week wait pathway
C. Arrange CT chest, abdomen and pelvis (Correct Answer)
D. Prescribe oral prednisolone 30mg daily
E. Screen for depression and commence antidepressant therapy

Explanation: ***Arrange CT chest, abdomen and pelvis*** - The patient's **unexplained weight loss** (5kg over 3 months), **persistent fatigue**, and elevated **inflammatory markers** (ESR 52 mm/hr, CRP 28 mg/L) are significant red flags for an underlying serious condition, such as **malignancy** or systemic inflammatory disease. - A normal chest X-ray does not rule out pathology in other areas; a **CT scan of the chest, abdomen, and pelvis** is the most appropriate comprehensive imaging modality to identify occult solid tumors, lymphadenopathy, or widespread inflammatory processes that could explain her symptoms. *Reassure and review in 3 months* - **Unexplained weight loss** and persistently **elevated inflammatory markers** strongly suggest an organic pathology that requires urgent investigation, not reassurance. - Delaying further diagnostic workup for three months could significantly delay the diagnosis and treatment of potentially serious conditions, including **cancer**, which might worsen the prognosis. *Refer urgently to haematology under 2-week wait pathway* - While some haematological conditions can cause fatigue and elevated ESR, the patient's **full blood count** (Hb, WCC, platelets) is largely normal, making a primary haematological malignancy less likely as the immediate referral indication. - A **CT scan** is a broader initial investigation that can identify solid tumors or lymphadenopathy in various locations, which may then guide the appropriate specialist referral. *Prescribe oral prednisolone 30mg daily* - Administering **corticosteroids** empirically without a definitive diagnosis is inappropriate and potentially harmful, as it can mask symptoms and signs of serious infections or **malignancies**. - Steroids can also interfere with diagnostic tests, such as biopsies, and cause significant systemic side effects without addressing the **underlying cause** of the patient's symptoms. *Screen for depression and commence antidepressant therapy* - Although fatigue and weight loss can be symptoms of **depression**, the presence of significantly **elevated ESR and CRP** strongly points towards an underlying **organic physical illness** rather than a primary psychiatric disorder. - It is crucial to thoroughly **exclude medical causes** with appropriate investigations before concluding that the symptoms are solely attributable to a mental health condition and initiating psychiatric treatment.

Question 168: A 68-year-old man presents with a 4-month history of unintentional weight loss of 8kg and increasing fatigue. He has a history of type 2 diabetes mellitus and hypertension. On examination, his BMI is 21 kg/m². Cardiovascular and respiratory examinations are unremarkable. Blood pressure is 138/82 mmHg, pulse 76/min regular. What is the most appropriate initial investigation?

A. Full blood count, renal function, liver function tests, thyroid function tests, HbA1c, and chest X-ray (Correct Answer)
B. CT chest, abdomen and pelvis
C. Upper gastrointestinal endoscopy
D. Colonoscopy
E. PSA and urinalysis

Explanation: ***Full blood count, renal function, liver function tests, thyroid function tests, HbA1c, and chest X-ray*** - In patients with **unintentional weight loss**, the first-line approach in primary care involves broad screening to identify common causes such as **malignancy**, **chronic disease**, or **endocrine disorders**. - This panel covers essential differentials: FBC for **anemia or infection**, HbA1c for **uncontrolled diabetes**, TFTs for **hyperthyroidism**, and a CXR to screen for **lung malignancy**. *CT chest, abdomen and pelvis* - While highly sensitive for detecting occult **malignancy**, cross-sectional imaging is not considered an **initial investigation** without localizing symptoms. - Performing a CT-CAP as the first step is not **cost-effective** and exposes the patient to unnecessary **radiation** before simpler tests are conducted. *Upper gastrointestinal endoscopy* - This is a targeted investigation used to evaluate specific symptoms such as **dysphagia**, persistent **dyspepsia**, or suspected **gastric cancer**. - In the absence of specific GI symptoms (e.g., vomiting, early satiety), it is not appropriate as the **first-line screening** tool for generalized weight loss. *Colonoscopy* - Colonoscopy is indicated if the patient presents with a **change in bowel habit**, rectal bleeding, or unexplained **iron-deficiency anemia**. - Without specific lower GI symptoms or a positive **fecal immunochemical test (FIT)**, it would not be the immediate next step. *PSA and urinalysis* - Urinalysis is useful for checking for **proteinuria** or **glycosuria**, and PSA can screen for **prostate cancer**, but these are too narrow in scope. - Relying only on these tests would miss more common systemic causes, making them part of a wider assessment rather than a standalone **initial investigation**.

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Undifferentiated Symptoms — MCQs

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