Radiological case of the month.
D006801:Humans; D006869:Hydronephrosis / Q000151:congenital* / Q000000981:diagnostic imaging; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000000981:diagnostic imaging*; D008297:Male; D011859:Radiography; D014517:Ureteral Obstruction / Q000151:congenital* / Q000000981:diagnostic imaging; D014552:Urinary Tract Infections / Q000150:complications