Endopyelotomy for primary repair of ureteropelvic junction obstruction.

A total of 12 patients underwent primary repair of ureteropelvic junction obstruction between November 1, 1985 and December 31, 1986. Ten patients underwent percutaneous incision of the ureteropelvic junction (endopyelotomy) as the initial effort to correct the obstruction. Two patients with ureteropelvic junction obstruction associated with an aberrant lower pole renal artery underwent dismembered pyeloplasty (Anderson-Hynes) via a flank incision. Of the 10 patients who underwent endopyelotomy 8 (80 per cent) have shown radiographic improvement. Radiographic stability of the obstructed ureteropelvic junction was demonstrated in the remaining 2 patients. No patient exhibited evidence of increased obstruction or decreased renal function. No patient required prolonged or rehospitalization for complications, and none required additional endoscopic or surgical procedures. All patients have remained clinically well after the initial release from the hospital.