Peripheral Zone of the Prostatic Parenchyma

**Semantic type:** Tissue

**Definition:** Prostatic parenchyma that occupies the posterior and lateral aspects of the prostate gland. The glandular architecture consists of small, round acini amid loosely woven, randomly oriented stroma. The peripheral zone contains large, so-called main glands, whose ducts run posteriorly to open into the urethra. Approximately 70% of the prostate gland lies in the peripheral zone.

**Synonyms:** - PZ