It is located below the bladder and in front of the rectum . The prostate surrounds the upper part of the urethra , the tube that empties urine from the bladder. The prostate needs male hormones to function. The main male hormone is testosterone , which is made mainly by the testicles . Some male hormones are produced in small amounts by the adrenal glands .
Cancer is a group of many different diseases that have some important things in common.
They all affect cells, the body's basic unit of life. To understand cancer, it is helpful to know about normal cells and what happens when cells become cancerous. The body is made up of many types of cells. Normally, cells grow and divide to produce more cells only when the body needs them. This orderly process helps keep the body healthy.