Prostate cancer is the most common type of cancer found in American men of any sexual orientation.
Its cause is still unknown. The number of new cases diagnosed each year has doubled over the past ten years, due to new tests that have helped doctors detect prostate cancer. Prostate cancer frequently occurs in men over 50, although the number of cases involving men over 45 has also increased. It is most common in men over 65. African-American men and men whose family members have developed prostate cancer are more likely to develop it.