Acquired undescended testes.

Three cases of reascent of a previously unequivocally documented descended testis have been encountered. Chorionic gonadotropin treatment was initially attempted in each child and was successful in causing descent of the involved testis in one. The testes of the other two boys were successfully brought down surgically. Possible causes for testicular reascent are presented and the pertinent literature is reviewed. These cases illustrate the need for continued diligence and interval examination of the pediatric scrotum throughout childhood.