Upj obstruction in adult ( r kidney). best treatment?

Surgery: As you may know there is no medical treatment. Endoscopic endopyelotomy is the least invasive and requires several weeks of stenting( a tube left in the ureter to drain urine from kidney to bladder) until healing. Another option is laparoscopic or robotic repair but this can only be done by a urologist with extensive experience in this. Open surgery is, of course, the time tested treatment.