Male Genital System

The normal prostate contains several distinct regions, including a central zone (CZ), a peripheral zone (PZ), a transitional zone (TZ), and a periurethral zone. Most carcinomas arise from the peripheral glands of the organ and are often palpable during digital examination of the rectum. Nodular hyperplasia, in contrast, arises from more centrally situated glands and is more likely to produce urinary obstruction early in its course than is carcinoma.
Adult prostate