During TURP, surgeon takes care to dissect above the verumontanum to prevent injury to :
**Core Concept**
During Transurethral Resection of the Prostate (TURP), the surgeon must carefully dissect above the verumontanum to avoid damaging the surrounding structures, which are crucial for urinary continence and potency.
**Why the Correct Answer is Right**
The verumontanum serves as a landmark for the surgeon to prevent injury to the seminal colliculus, which contains the openings of the prostatic utricle and the prostatic ducts. Dissecting above the verumontanum helps to preserve these structures, thereby maintaining urinary continence and preventing potential complications such as incontinence or ejaculatory dysfunction. The seminal colliculus is also closely associated with the ejaculatory ducts, which are essential for male fertility.
**Why Each Wrong Option is Incorrect**
**Option A:** The correct answer is not related to the external urethral sphincter, which is located more proximally in the urethra and is not directly associated with the verumontanum.
**Option B:** The correct answer is not related to the membranous urethra, which is a distinct anatomical structure that is not directly associated with the verumontanum.
**Option C:** The correct answer is not related to the prostatic urethra, which is the part of the urethra that passes through the prostate gland, but is not specifically related to the verumontanum.
**Clinical Pearl / High-Yield Fact**
The verumontanum is a critical anatomical landmark during TURP, and dissecting above this structure is essential to prevent damage to the surrounding structures that are crucial for urinary continence and male fertility.
**Correct Answer: C. Prostatic ducts and seminal colliculus.**