Diabetes Mellitus USMLE Step 1 Practice Question
A 59-year-old man presents with chronic steatorrhea, mild diabetes, and recurrent abdominal pain. Vital signs show BP 128/82 mmHg, HR 92/min, RR 16/min, temp 37.2°C, and SpO2 98%. Laboratory studies reveal fasting glucose 156 mg/dL and markedly elevated gastrin levels. Gastric pH is 1.5. Abdominal imaging demonstrates a 2-cm pancreatic neuroendocrine tumor; esophageal ulceration is notably absent. Which hormone is most likely being secreted in excess?
Answer choices
- AVIP
- BGastrin
- CSomatostatinCorrect answer
- DGlucagon
- EInsulin
- FPancreatic polypeptide
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