Prostate cancer begins when cells in the prostate gland start to grow uncontrollably.

The prostate is a gland found only in males. It makes some of the fluid that is part of semen. The prostate is below the bladder and in front of the rectum. The size of the prostate changes with age. In younger men, it is about the size of a walnut, but it can be much larger in older men. Just behind the prostate are glands called seminal vesicles that make most of the fluid for semen. The urethra, which is the tube that carries urine and semen out of the body through the penis, goes through the center of the prostate.

Types of prostate cancer

Almost all prostate cancers are adenocarcinomas. These cancers develop from the gland cells (the cells that make the prostate fluid that is added to the semen).

Other types of prostate cancer include:

• Sarcomas
• Small cell carcinomas
• Neuroendocrine tumors (other than small cell carcinomas)
• Transitional cell carcinomas

These other types of prostate cancer are rare. If you have prostate cancer it is almost certain to be an adenocarcinoma.

Some prostate cancers can grow and spread quickly, but most grow slowly. In fact, autopsy studies show that many older men (and even some younger men) who died of other causes also had prostate cancer that never affected them during their lives. In many cases neither they nor their doctors even knew they had it.

Treatment

Once your prostate cancer has been diagnosed and staged, you have a lot to think about before you and your doctor choose a treatment plan. It’s important that you think carefully about each of your choices. You will want to weigh the benefits of each treatment option against the possible risks and side effects.

Which treatments are used for prostate cancer?

Depending on each case, treatment options for men with prostate cancer might include:

• Watchful waiting or active surveillance
• Surgery
• Radiation therapy
• Cryotherapy (cryosurgery)
• Hormone therapy
• Chemotherapy
• Vaccine treatment
• Bone-directed treatment

These treatments are generally used one at a time, although in some cases they may be combined.