The role of the processus vaginalis in cryptorchidism. Does a patent processus vaginalis have a prognostic importance for predicting subsequent fertility?

A cryptorchid testis within an open processus vaginalis is a frequent operative finding. An almost obligate additional epididymal dissociation (90%) and a ST-Index (Spermatogonia per tubulus) of 0-0.2 in over 50% of the patients are an indication of a complex and severe form of cryptorchidism. Postoperative treatment with a LHRH-analogon (Buserelin) is recommended.