Over the past four decades, testicular cancer has equaled - and probably surpassed - Hodgkin's disease as the number one cancer in young men between the ages of 15 and 34. Overall, it is still a rare neoplasm; 1 percent of all male cancers are testicular, with an incidence of two per 100,000 in the adult male population. In teenagers and young men, however, the incidence may be as high as one in 10,000, and it may be slowly increasing. The American Cancer Society estimates by 1999, there will...