Diabetes Mellitus USMLE Step 1 Practice Question
A 19-year-old man with a marfanoid body habitus presents with a thyroid nodule. Physical examination reveals mucosal neuromas on the lips and tongue. Vital signs: BP 128/82, HR 88, RR 16, Temp 37°C, SpO2 98%. Serum calcitonin is markedly elevated at 450 pg/mL (normal <10). Thyroid ultrasound confirms a 2-cm right lobe nodule. He denies headaches, palpitations, or abdominal pain. He takes no medications. Which additional malignancy carries the highest risk in this patient?
Answer choices
- AInsulinoma
- BProlactinoma
- CParathyroid adenoma
- DAdrenal cortical adenoma
- EPheochromocytomaCorrect answer
- FGastrinoma
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