The prostate is a gland that only occurs in men, at the base of the bladder. Cancer of the prostate typically occurs in men aged over 40 years old. If cancer of the prostate starts at age 40 years, it tends to grow fast. The older a man is when he develops it, the slower it tends to grow. In elderly men it can be harmless.
Cancer of the prostate caused 0.5% of all deaths worldwide in 2002, an average of 43 deaths per million people per year and 4% of all deaths from cancer.