Prostate cancer is the second leading cause of cancer-related deaths among men in the United States. It is thought that virtually all men with circulating androgens (hormones) will develop microscopic prostate cancer if they live long enough. In fact, when prostatic tissue is scrutinized under a microscope after surgery (or at autopsy), cancer is found in 50% of men older than age 70. It's found in virtually all men over age 90.