,HISTORY OF PRESENT ILLNESS:  ,The patient is a 3-1/2-year-old boy with a solitary kidney, had a ureteropelvic junction repair performed by Dr. Y, in the past, unfortunately, it was thought still be obstructed. 
,HISTORY OF PRESENT ILLNESS : , The patient is a 3 - 1/2 - year - old boy with a solitary kidney , had a ureteropelvic junction repair performed by Dr. Y , in the past , unfortunately , it was thought still be obstructed .