Sometimes, however, cells get out of control. They divide too much and form masses known as tumors. These are known as benign tumors. There they may form more malignant tumors. The rate of growth and spread of prostate cancer vary widely.
Some tumors grow rapidly.
Others grow so slowly they do not even produce symptoms during a man's lifetime. Several factors associated with a higher rate of prostate cancer, however, have been identified. The risk of developing prostate cancer increases as man ages. For reasons not known currently, black Americans have the highest incidence rate in the world. A family history of prostate cancer in a brother or father also doubles ones chances of getting prostate cancer.