The prostate gland is actually not a single gland. It is comprised of a collection of glands that are covered by a capsule. A gland is a structure or organ that produces a substance used in another part of the body. The prostate gland lies below the bladder, encircles the urethra, and lies in front of the rectum. Because it lies just in front of the rectum, the posterior aspect of the prostate can be assessed during a rectal examination. The normal size of the prostate gland is about the size of a walnut (Figures 1 and 2)
