[Percutaneous pyeloplasty of ureteropelvic junction stenoses].

From March 1990 to November 1993, percutaneous endopyelotomy was performed in 22 patients for treatment of symptomatic ureteropelvic obstruction. One patient was treated bilaterally. In three patients renal pelvic stones were removed during the same procedure. Clinical findings, intravenous pyelography and isotope renography were considered in preoperative and postoperative evaluation. Overall, 18 of 23 procedures (79%) were successful. The success rate was lowest in patients with enlarged renal pelvis. Failed procedures became evident less than six months after operation.