So far, research has not shown a connection between testicular cancer and any particular habits, activities, or lifestyles. There is evidence that the risk of testicular cancer is higher in men whose testicles did not descend normally -- that is, move down from the lower abdomen into the scrotum. For this reason, surgery is often performed to correct this problem before the testicle has been left undescended for very long.
Also, a family history of testicular cancer increases the chance that another male member of the family may develop the disease. One's racial background may have some effect on the incidence of testicular cancer. When compared with African Americans, Caucasian Americans have a five to ten times increased likelihood of developing the disease, and white Americans have twice as great a risk as Asian Americans. Finally, it has been said that the risk of testicular cancer may be higher in men infected with HIV, the virus that causes AIDS, but evidence for this is weak. Likewise, there is no evidence to support a connection between injury to the testicles and testicular cancer.
