[Surgical aspects of hormone therapy in cryptorchism]

46 boys were sent for operation and have been treated primary with LH-RH nasal spray. Only 5 boys (10.9%) achieved permanent scrotal position. (Follow up time 15.8 months). Nevertheless we could see during hormonal treatment clinical improvement of testicular position in 46.8%. Partial mobilisation can improve the result of the operation. Enlargement of hypoplastic genitalia is a positive side-effect of hormonal therapy. Poor results from hormonal therapy have boys with congenital anomalies as hypoplastic genitalia, intraabdominal or intracanalicular position of testis and combinations with other malformations. Better results from hormonal therapy have testes in a low position with normal developed external genitalia.