Diabetes Mellitus USMLE Step 1 Practice Question
A 46-year-old man presents with progressive hand and jaw enlargement, frontal headaches, and visual field defects. Vital signs show BP 158/92 mmHg, HR 88/min, RR 16/min, temperature 37.2°C. Examination reveals coarse facial features, prognathism, and bitemporal hemianopia. Fasting glucose is 156 mg/dL. MRI demonstrates a 2-cm sellar mass. No galactorrhea or amenorrhea noted. Which pituitary cell type is most likely undergoing neoplastic proliferation?
Answer choices
- ASomatotrophsCorrect answer
- BThyrotrophs
- CCorticotrophs
- DLactotrophs
- EGonadotrophs
- FMelanotrophs
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