During TURP, surgeon takes care to dissect above the verumontanum to prevent injury to :: (A) Urethral crest, (B) Trigone of bladder, (C) External urethral sphincter, (D) Prostatic utricle
Answer is C. Verumontanum is midline elevation on the posterior wall of the prostatic urethra. It acts as a surgical landmark. It lies immediately proximal to the external urethral sphincter. It thus serves as a distal landmark for prostatic resection in TURP to prevent injury to the external urethral sphincter. "The verumontanum serves as a significant landmark to stop resection because the external urethral sphincter lies just distal to it." Ref - Reoperative Pelvic Surgery By Richard P. Billingham p225