[Acute renal insufficiency due to hydronephrosis]

Acute renal failure due to hydronephrosis is a rare pathology. It can occur unilaterally, or as a pyelo-ureteral junction (PUJ) bilateral syndrome. In the present study, two cases have been reported. The diagnosis was based on ultrasonographic findings which showed hydronephrosis, and on descending pyelo-ureterography (DPU), which demonstrated an absence of opacification. Infection was present in one case. Preliminary treatment consisted of percutaneous nephrostomy, followed by surgical pyelo-ureteral resection and Anderson-Hynes pyeloplasty which gave good results (95% success rate), and which enabled a satisfactory recovery of renal function to be obtained.