Imaging diagnosis--nasal septal and laryngeal cyst-like malformationsin a Thoroughbred weanling colt diagnosed using ultrasonography and magnetic resonance imaging.
A foal was examined for abnormal upper airway noise. Endoscopically, there were narrowed nasal passages and an extralumenal mass of the cranial trachea. Using ultrasonography and magnetic resonance (MR) imaging of the larynx and cranial cervical trachea, irregular margins of the laryngeal cartilages and first tracheal ring containing areas consistent with fluid were identified. In MR images, a widened nasal septum was seen that contained material consistent with fluid. Postmortem examination confirmed the diagnosis of nasal septal, laryngeal, and cranial cervical tracheal cyst-like lesions. This is a unique congenital condition, in which premortem imaging was instrumental in defining the abnormalities.
Department of Diagnostic Imaging, Rood and Riddle Equine Hospital, PO Box 12070, Lexington, KY 40580, USA. kgarrett@roodandriddle.com
Katherine S
KS
Garrett
J Brett
JB
Woodie
Jeffery L
JL
Cook
Neil M
NM
Williams
D000818:Animals; D005065:Euthanasia; D006734:Horse Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D006736:Horses; D007818:Laryngeal Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D007830:Larynx / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods; D009300:Nasal Septum / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D014463:Ultrasonography