Cancer-specific Studies in the NCI Division of Cancer Epidemiology and Genetics
Testicular Cancer among U.S. Servicemen
Though testicular germ cell tumors (TGCT) are relatively infrequent in the population as a whole, TGCT is the most common cancer among U.S. males in the age group 25-34 years. The Servicemen’s Testicular tumor Environmental Endocrine Determinants Study (STEED) investigated TGCT among members of the U.S. armed forces. The analysis of the sons' responses found no relationship between childhood physical activity and TGCT, while the mothers' analysis found an inverse association, which was solely due to nonseminoma. Results also suggest that increased height is a risk factor for TGCT, though body mass index is not.