Which prostate zone surrounds the proximal prostatic urethra?

Which prostate zone surrounds the proximal prostatic urethra?

• A. Peripheral
• B. Transitional
• C. Fibromuscular
• D. Central zone surrounding proximal prostatic urethra

Answer: (D)

Prostate zones are arranged around the urethra in a specific way. The part of the prostatic urethra closest to the bladder neck—the proximal prostatic urethra—is surrounded by the transitional zone. This periurethral zone encases the urethra as it traverses the prostate and is the region where benign prostatic hyperplasia occurs clinically. The central zone, in contrast, forms a wedge around the ejaculatory ducts at the base of the gland and does not encircle the proximal urethra. The peripheral zone lies mainly at the posterior aspect and constitutes most of the glandular tissue, while fibromuscular stroma is supportive tissue rather than a glandular zone.

Prostate zones are arranged around the urethra in a specific way. The part of the prostatic urethra closest to the bladder neck—the proximal prostatic urethra—is surrounded by the transitional zone. This periurethral zone encases the urethra as it traverses the prostate and is the region where benign prostatic hyperplasia occurs clinically. The central zone, in contrast, forms a wedge around the ejaculatory ducts at the base of the gland and does not encircle the proximal urethra. The peripheral zone lies mainly at the posterior aspect and constitutes most of the glandular tissue, while fibromuscular stroma is supportive tissue rather than a glandular zone.