Retrograde Holmium- YAG Laser Endopyelotomy

Endourologic pyeloplasty is being a substitute of open pyeloplasty in management ofureteropelvic junction obstruction. This procedure can be done in different mannerslike balloon dilation, cold knife and electrosurgical endoureterotomy, accucise andlasers.A 47 year old woman referred with history of previous open pyeloplasty.Hydronephrosis of right kidney with unremarkable T ½ was found in DTPA scan.A full-thickness lateral incision was done with holmium:YAG laser just below theright UPJ and carried through the stenotic segment until the renal pelvis was reached.Half-time of radioisotope excretion was 13 min for the right kidney in diureticrenogram 3 months following operation.