Testicular cancer is more common in white men than black or Asian.
Although it accounts for only about 1 percent of all cancers in men, it is the number one cancer killer among men in their 20's and 30's. Most testicular cancers are self-discovered by patients as a painless or uncomfortable lump in the testicle. Forty percent of the testicular cancers have mixture of histology. The cancer risk for boys with a history of undescended testicles is about 10-40 times higher than normal individuals. The risk of developing the disease was estimated at 1 out of 20 for a testis retained in the abdomen and 1 out of 80 if it was within the inguinal canal.