Urologic cancers include cancers of the kidney, bladder, prostate and testicles, all are relatively common. Prostate cancer, for example, affects one out of every six men at some time in his life — most often after age 50. Bladder cancer is the fourth most common cancer among men and the ninth most common among women in the United States. Each year, more than 50,000 new cases of bladder cancer are diagnosed. Among American men age 15 to 44, testicular cancer is the most common.