Diabetes Mellitus USMLE Step 1 Practice Question
A 56-year-old woman with poorly controlled type 2 diabetes mellitus presents with a 3-week history of weight loss and perioral stomatitis. Vital signs: BP 138/82, HR 92, RR 18, Temp 37.2°C, SpO2 98%. She has a migratory erythematous rash with blistering and crusting over the groin and extremities. Laboratory studies reveal fasting glucose 285 mg/dL, elevated glucagon level of 850 pg/mL, and normal albumin. She denies diarrhea. Which diagnosis best explains these findings?
Answer choices
- AProlactinoma
- BVIPoma
- CGlucagonomaCorrect answer
- DSomatostatinoma
- EInsulinoma
- FGastrinoma
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