title: IMAGING DIAGNOSIS-IDIOPATHIC HYOID MALFORMATION IN AN 8-YEAR-OLD WELSH SECTION D HORSE.
abstract: An 8-year-old gelding was evaluated for intermittent dorsal displacement of the soft palate (DDSP) at exercise. Standing laterolateral radiographs demonstrated an abnormal crossed appearance of the stylohyoid bones. Computed tomography (CT) confirmed abnormal positioning of the left stylohyoid bone and articulations with both the left thyrohyoid and ceratohyoid bones. Surgical treatment consisted of combined left ceratohyoidectomy and thyrohyoidectomy. Postoperatively the patient's presenting complaint resolved completely, with the horse returning to full work. Standing laterolateral radiographs should be obtained prior to laryngeal or hyoid surgery to rule out hyoid anomalies, which could result in surgical failure or subsequent hyoid fracture.
authors.affiliation: Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK.
authors.forename: Jonathon
authors.initials: J
authors.lastname: Dixon
authors.affiliation: Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK.
authors.forename: Marianna
authors.initials: M
authors.lastname: Biggi
authors.affiliation: Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK.
authors.forename: Etienne J O
authors.initials: EJ
authors.lastname: O'Brien
authors.affiliation: Farr & Pursey Equine Veterinary Services Ltd, Church Farm, Aldbury, Hertfordshire, HP23 5RS, UK.
authors.forename: Ricky
authors.initials: R
authors.lastname: Farr
authors.affiliation: Department of Clinical Sciences and Services, Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK.
authors.forename: Thomas H
authors.initials: TH
authors.lastname: Witte
mesh_terms: D000818:Animals; D006736:Horses / Q000002:abnormalities* / Q000601:surgery; D006928:Hyoid Bone / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D014057:Tomography, X-Ray Computed / Q000662:veterinary
keywords: DDSP; computed tomography; equine; hyoid; larynx