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?
Q42
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?
Q43
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?
Q44
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?
Q45
In the assessment of chronic pain in primary care, which statement best describes the concept of 'pain catastrophizing' and its significance in pain management?
Q46
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?
Q47
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?
Q48
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?
Q49
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?
Q50
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?
Undifferentiated Symptoms UK Medical PG Practice Questions and MCQs
Question 41: 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 42: 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 43: 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 44: 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 45: 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 46: 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 47: 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 48: 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 49: 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 50: 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.
