Fatherhood in testicular cancer patients with carcinoma in situ in the contralateral testicle.

We report paternity by assisted fertilization in 3 highly oligospermic patients with stage-I unilateral testicular germ cell tumor and contralateral carcinoma in situ. If such patients plan future paternity, surveillance is the optimal treatment allowing maximal recovery of spermatogenesis after orchiectomy. Multiple semen cryopreservations should be done during the first post-orchiectomy year.