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?
Q72
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?
Q73
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?
Q74
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?
Q75
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?
Q76
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?
Q77
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?
Q78
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?
Q79
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?
Q80
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?
Undifferentiated Symptoms UK Medical PG Practice Questions and MCQs
Question 71: 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 72: 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 73: 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 74: 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 75: 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 76: 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 77: 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 78: 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 79: 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 80: 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.
