Histology USMLE Step 1 Practice Question
A 71-year-old man presents with urinary hesitancy, weak urinary stream, and nocturia ×3 per night. Vital signs: BP 138/82 mmHg, HR 76/min, RR 14/min, Temp 37.2°C. Digital rectal examination reveals a smooth, enlarged prostate without nodules. Post-void residual volume is 120 mL. PSA is 3.2 ng/mL. Hyperplasia in which of the following prostatic regions most likely causes his obstructive symptoms?
Answer choices
- ACentral zone of prostate
- BAnterior fibromuscular stroma
- CPeripheral zone of prostate
- DTransitional zone of prostateCorrect answer
- ERectouterine pouch
- FPreprostatic urethra
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