Undifferentiated Symptoms — MCQs
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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 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 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 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 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 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 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 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 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 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?
Undifferentiated Symptoms UK Medical PG Practice Questions and MCQs
Question 121: 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 122: 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 123: 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 124: 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 125: 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 126: 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 127: 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 128: 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 129: 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 130: 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.
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