ALL DEFINITIONSTesticular CancerDefinitionTesticular cancer is a type of cancer that originates in the testicles, the male reproductive organs responsible for producing sperm and hormones. It is a relatively rare but highly treatable condition.Related Fact SheetsTesticular CancerUrologic CancersGerm Cell TumorsProstate CancerPenile and Urethral CancerRelated NewsFamily Health, Doctors & AdviceWhich Body Part Predicts a Man’s Health Issues?