Contralateral testicular torsion after previous unilateral orchiopexy for undescended testis.

Torsion of testis after previous fixation of the same testis has been described several times. Contralateral torsion of unilateral fixed testis might result in subfertility. Four cases of later torsion of the contralateral testis after previous orchiopexy for unilateral undescended testis are presented along with a review of the literature.