title: What is your diagnosis? Tracheal collapse at the level of the sixth cervical vertebra.
authors.affiliation: Department of Surgery, New Bolton Center, University of Pennsylvania, Kennett Square 19348, USA.
authors.forename: A M
authors.initials: AM
authors.lastname: Woodford
authors.forename: D K
authors.initials: DK
authors.lastname: Baird
authors.forename: J A
authors.initials: JA
authors.lastname: Orsini
mesh_terms: D000818:Animals; D003937:Diagnosis, Differential; D004417:Dyspnea / Q000209:etiology / Q000662:veterinary; D018397:Equidae; D014132:Trachea / Q000000981:diagnostic imaging*; D014135:Tracheal Stenosis / Q000000981:diagnostic imaging / Q000662:veterinary*; D014986:Xeroradiography / Q000662:veterinary*