Obstruction of the ureteropelvic junction is one of the common causes of hydronephrosis. It can result from ureteral stenosis, polyps, high connections, or compression by external ectopic vessels, cords, or dysfunction at the UPJ site. Pyeloureteral dissection and ureteroplasty is the gold standard of treatment. Laparoscopic pyeloureteral dissection and ureteroplasty is a difficult procedure that has been developed in recent years.