A 26 y old male with left flank pain and sever left side hydronephrosis underwent abdominal CT scan wich revealed left side hydronephrosis without hydroureter. Ureteroscopy and retrograde pyelography showed impaired left side drainage . a modified Fenger laparoscopic pyeloplasty was performed by Dr Aghamir and Salavati and patient was rendered symtom free 4weeks later after stent removal

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