The prostate is a gland located immediately below the bladder, in front of the bowels. It produces fluid that protects and enriches sperm.
Prostate cancer occurs when some of the cells in the prostate reproduce far more rapidly than normal, resulting in a tumour. If left untreated, prostate cancer cells may eventually spread from the prostate and invade distant parts of the body, particularly the lymph nodes and bones, producing secondary tumours in a process known as metastasis.
One of the most worrying aspects of the disease is that most prostate cancers develop without men experiencing any symptoms in the early stages.