The value of bilateral biopsy in unilateral cryptorchidism.

: Here are the results of bilateral biopsies on 52 cases of unilateral cryptorchidia. In 12 patients the scrotal testicle showed equal lesions or more important lesions in the undescended testicle. It points out the importance of systematizing the histological testicular study, keeping in mind: (1) spermatogenic index; (2) variation in spermatogonias; (3) tubular diameter, and (4) interstitial tissue. Stress is made on the innocuousness of the bilateral testicular biopsy and its indispensability since it is the only way to recognize a dysgenetic cryptorchidia and evaluate the future fertility of the patient.