Diabetes Mellitus USMLE Step 1 Practice Question
A 43-year-old woman presents with recurrent episodes of confusion, diaphoresis, and tremor that resolve within minutes of eating. During a symptomatic episode, vital signs show HR 98/min, BP 128/82 mmHg, and RR 16/min. Laboratory studies reveal serum glucose 38 mg/dL, insulin 18 mIU/L (elevated), and C-peptide 3.2 ng/mL (elevated). Hepatic function tests are normal. She denies current medication use. Which of the following is the most likely diagnosis?
Answer choices
- ASomatostatinoma
- BGlucagonoma
- CInsulinomaCorrect answer
- DExogenous insulin administration
- EVIPoma
- FSulfonylurea use
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