Cancer is a group of abnormal cells that grow more rapidly than normal cells and that refuse to die. Cancer cells also have the ability to invade and destroy normal tissues, either by growing directly into surrounding structures or after traveling to another part of your body through your bloodstream or lymph system (metastasize). Microscopic cancer cells develop into small clusters that continue to grow, becoming more densely packed and hard.
What causes prostate cancer and why some types behave differently are unknown. Research suggests that a combination of factors may play a role, including heredity, ethnicity, hormones, diet and the environment.
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