title: The "spinnaker sail" appearance of the posterior urethral valve in infants.
mesh_terms: D001201:Ascites / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D004108:Dilatation, Pathologic; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000000981:diagnostic imaging*; D008297:Male; D011859:Radiography; D014521:Urethra / Q000002:abnormalities*; D014525:Urethral Stricture / Q000000981:diagnostic imaging* / Q000401:mortality; D014555:Urination Disorders / Q000209:etiology; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging