<prompt> A lady present with UL hydronephrosis on USG. She is asymptomatic. Ureteropelvic drainage is normal. What isare treatment modality for herPyleroplastyAnalgesia SOSNephrectomyDJ stenting  <response>: The indications for operation are bouts of renal pain, increasing hydronephrosis, evidence of parenchymal damage and infection. Nephrectomy should be considered only when the kidney has largely lost most of its function 10 split function. Mild cases should be followed by serial ultrasound scans and operated upon if dilatation is increasing ref : Bailey 27th ed , chapter 76 , pg no : - 1412 UPJO uretopelvic junction obstruction may not become apparent until middle age or later . Occasionally, if the patient is asymptomatic and the physiologic significance of the obstruction seems indeterminate, careful observation with serial follow-up renal scans is appropriate. ref :- Campbell-Walsh urology 11th ed , chapter 49 , pg no 1408 