Hydronephrosis due to pelviureteric junction obstruction in infancy.

Thirty-one cases of hydronephrosis caused by pelviureteric obstruction have been treated during the last 12 years at the Saint-Vincent de Paul Hospital in Paris. There were only 3 bilateral cases but a significant number of contralateral anomalies. No primary nephrectomy was done but 2 children had a secondary nephrectomy. Evaluation of late results showed practically no change from the early post-operative urogram; a 197 Ce2 scintigram proved a useful adjunct for assessment of renal function. A further study will be necessary to make sure that the results remain stable in adult life.