Ureteral Stents Versus Percutaneous Nephrostomy for Initial Urinary Drainage

Inclusion Criteria: * children ≤12 years old presenting with Obstructive Anuria and Acute Renal Failure due to bilateral ureteric stones Exclusion Criteria: * Patients with grade 0-1 hydronephrosis * fever, pyonephrosis or sepsis. * any contraindication to both methods of drainage (urinary diversion, urethral stricture or uncontrolled coagulopathy).