Pituitary Disorders USMLE Step 1 Practice Question
A 41-year-old man presents with decreased libido, erectile dysfunction, and progressive headaches for 8 months. Vital signs show BP 128/82 mmHg, HR 76/min, RR 14/min, temp 37°C, SpO2 98%. Examination reveals bilateral gynecomastia and bitemporal hemianopia. Laboratory studies show elevated prolactin at 180 ng/mL with normal TSH. MRI demonstrates a 1.8 cm sellar mass with suprasellar extension. Visual acuity remains intact. Which cell type most likely gave rise to this lesion?
Answer choices
- ALactotrophCorrect answer
- BSomatotroph
- CGonadotroph
- DThyrotroph
- ECorticotroph
- FBasophil adenoma of the anterior pituitary
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