According to the American Cancer Society, nearly 100% of men with low- to intermediate-grade prostate cancer (the most common types) can expect to live at least five years after the initial diagnosis. Since many men who get prostate cancer are already elderly, they are more likely to die from causes other than the cancer.
More than 90% of the time prostate cancer is discovered while it is either confined to the prostate gland or has spread beyond the prostate only to a small degree, referred to as regional spread.
Among the less than 10% of men whose prostate cancers have already spread to distant part of the body at the time of diagnosis, about 30% are expected to survive at least five years.