title: Urethral valves presenting as an encysted retroperitoneal urinary collection (pseudohydronephrosis).
mesh_terms: D003937:Diagnosis, Differential; D004106:Dilatation; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis*; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases; D010535:Laparoscopy; D008297:Male; D011859:Radiography; D014521:Urethra / Q000002:abnormalities*; D014525:Urethral Stricture / Q000151:congenital* / Q000000981:diagnostic imaging / Q000601:surgery