Many women also perform breast self-exams, although this is not a substitute for clinical breast exams or mammography. National Cancer Institue Back to Top Testes Self-Examination Testicular cancer is the most common type of cancer in men ages 20 to 35. Yet because it accounts for only about 1 percent of all cancers in men, many people have never heard of this type of cancer. Testicular cancer is of special concern to young men. It can occur anytime after age 15, and is less common in middle-aged and older men.
White men are four times more likely to develop testicular cancer than black men.
The rate among Hispanic men lies between those of blacks and whites. Testicular cancer is 3 to 17 times more likely to develop in these men. Testicles are male reproductive organs. They produce and store sperm. They also produce testosterone, a hormone that causes such male traits as facial hair and lower voice pitch.