[Hydronephrosis caused by an inferior polar vessel]

We present our statistics and results obtained in the conservative treatment of hydronephrosis in the inferior polar vessel with a kind of operation with certain modifications which we consider to be of practical interest and determined by the following premises:--Disappearance of pain after the operation. --Functional reestablishment and anatomical involution of the deformity. --Conservation of all the kidney tissue and its vascularization. --No possibility of infection due to permanent drainage and catheters.