[Congenital hydronephrosis: pyeloureteral junction syndrome. Surgical treatment].

This paper reviews the surgical procedure performed in 119 kidneys (114 children), diagnosed with congenital hydronephrosis due to pyeloureteral juncture stenosis (PUJS). Approaches used for diagnosis and choice of surgical techniques are commented. Puncture/nephrostomy with functional kidney assessment has been the method selected in extreme cases. Nephrectomy was the chosen option in 8 cases (6.7%) while conservative surgery was indicated in the others. Anderson-Hynes dismembered pyeloureteral plasty was the technique used in 110 cases with a 97.28% rate of success. Post-operative occurrences are commented and are related to the presence of pre- and post-operative derivation.