Prostate cancer

Prostate cancer, usually refers to prostate adenocarcinoma, where adeno- means gland and carcinoma refers to uncontrolled growth of cells - so prostate cancer is a tumor or growth that originates in the prostate gland.

Only males are born with a prostate, so this condition only affects males and not females.

Typically, when there’s a prostate cancer it’s considered malignant, meaning that the tumor cells can metastasize, or invade and destroy surrounding tissues as well as tissues throughout the body.

The prostate is a small gland, about the size and shape of a walnut, that sits under the bladder and in front of the rectum.

The urethra which is the tube through which urine leaves the bladder, goes through the prostate before reaching the penis.

And that part of the urethra is called the prostatic urethra.

The prostate is covered by a capsule of tough connective tissue and smooth muscle.

Beneath this layer, the prostate can be divided into a few zones.

The peripheral zone, which is the outermost posterior section, is the largest of the zone and contain about 70% of the prostate’s glandular tissue.

Moving inward, the next section is the central zone which contains about 25% of the glandular tissue as well as the ejaculatory ducts that join with the prostatic urethra.

Last, is the transitional zone, which contains around 5% of the glandular tissue as well as a portion of the prostatic urethra.

The transitional zone gets its name because it contains transitional cells which are also found in the bladder.

The transitional zone undergoes hyperplasia, or an increase in the number of cells, in a large percentage of older men, and that often leads to compression of the urethra.

This is called benign prostatic hyperplasia and is often considered a normal part of aging.

At the microscopic level, each of the tiny glands that make up the prostate is surrounded by a basement membrane made largely of collagen.