What is prostate cancer? What causes it?
Prostate cancer is a malignant tumor that usually starts in the outer part of the prostate. As the tumor grows, it may spread to the inner part of the prostate and then beyond the gland to other parts of the body. In the early stages, prostate cancer causes no symptoms. As the tumor grows, it may squeeze the urethra, causing urinary problems. The causes of prostate cancer are not known for sure, but some studies suggest that diets high in fat may contribute to the development of the disease.
