The steeple sign.
Department of Radiology, Medical College of Virginia of Virginia Commonwealth University, 401 N 12th St, PO Box 980615, Richmond, VA 23298-0615, USA.
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D003440:Croup / Q000000981:diagnostic imaging; D004487:Edema / Q000000981:diagnostic imaging*; D005931:Glottis / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D014133:Tracheal Diseases / Q000000981:diagnostic imaging*; D014827:Vocal Cords / Q000000981:diagnostic imaging