What is prostate cancer?

Prostate cancer is the abnormal growth of cells in a man's prostate gland. The prostate sits just below the bladder. It makes part of the fluid for semen. In young men, the prostate is about the size of a walnut. As men age, the prostate usually grows larger.

Prostate cancer is common in men older than 65. It usually grows slowly and can take years to grow large enough to cause any problems. As with other cancers, treatment for prostate cancer works best when the cancer is found early. Often, prostate cancer that has spread responds to treatment. Older men who have prostate cancer usually die from other causes.

Experts don't know what causes prostate cancer, but they believe that your age, family history (genetics), and race affect your chances of getting it. What you eat, such as foods high in fats, may also play a part.

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