Cryptorchidism (Undescended Testes) By Ronald Rabinowitz, MD, University of Rochester Medical Center; Jimena Cubillos, MD, University of Rochester School of Medicine and Dentistry Reviewed / Revised Aug 2022 | Modified Sep 2022 View Patient Education Pathophysiology Etiology Symptoms and Signs Diagnosis Treatment Key Points Topic Resources Cryptorchidism (Undescended.. Cryptorchidism is failure of one or both testes to descend into the scrotum; in younger children, it is typically accompanied by inguinal hernia.