Diabetes Mellitus USMLE Step 1 Practice Question
A 47-year-old woman with type 2 diabetes presents with 4 months of large-volume watery diarrhea persisting during fasting. Vital signs show BP 118/76, HR 102, RR 18, temp 37°C. Labs reveal serum potassium 2.8 mEq/L and gastric pH 6.2. She reports progressive proximal muscle weakness and denies recent antibiotic use. Current medications include metformin and lisinopril. Which tumor best explains this clinical syndrome?
Answer choices
- ASomatostatinoma
- BVIPomaCorrect answer
- CZollinger Ellison syndrome
- DInsulinoma
- EGlucagonoma
- FGastrinoma
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