[Pyeloureterostomy in stenosis of the pyeloureteral junction of an incomplete collecting system].

Objectives: The possible solutions to a case of ureteral duplication complicated by obstruction of one of the collecting systems are reviewed.
Methods/results: We report an uncommon case of ureteropelvic junction obstruction in the lower system of an incomplete duplication of the collecting systems that was resolved by pyeloureterostomy.
Conclusions: Anastomosis of the lower renal pelvis to the upper ureter may provide a simple solution for the functional recovery of an important renal segment.