Outcome of apparent ureteropelvic junction obstruction identified by investigation of fetal hydronephrosis.

Objectives: The purpose of the study was to evaluate the outcome of prenatally detected ureteropelvic junction obstruction (UPJO) managed with a more conservative protocol.

Methods: The records and imaging studies of 77 consecutive neonates with UPJO identified by fetal hydronephrosis were reviewed. A nonoperative approach was attempted in patients with mild/moderate pelvic dilatation, renal units with good function as ascertained by DMSA scan and a non-obstructed pattern on DTPA.