based on fifty-eight nonsimultaneous contralateral testicular cancer cases and 19,995 'person-years at risk ' , the overall relative risk of invasive germ cell cancer in the contralateral testicle following a first germ cell testicular cancer was found to be 23.3 ( 95 % confidence interval : 18-30 ) .
C0153594
testicular cancer
C0039597
testicle