<prompt> Not true about PUJ obstruction is -Retrograde pyelography is useful to locate the site of obstructionEndoscopic pylotomy is contraindicatedWhittakar test is of clinical significanceDismembered pyloplasty is the procedure of choice  <response>: Endoscopic approaches such as endoscopic pyelotomy or ballon dilatation are used for the repair of PUJ obstruction. 