A congenital malformation of the maxilla of a horse.
A 1-month-old male American Paint Horse was evaluated for a hard swelling on the right side of the maxillary region. On radiographs there was a large, expansile outpouching of the right maxillary bone between the second and third premolar teeth. Computed tomography further characterized the expansile lesion to have a soft tissue component and to originate in the region of a caudal maxillary tooth. Surgical reconstruction of the defect was unsuccessful and the animal was euthanetized. Based on failure to find histopathologic evidence of a neoplasm or cyst, the diagnosis was a congenital malformation.
Tudor
R A
RA
Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh 27606, USA.
Ramirez
O
O
Tate
L P
LP
Gerard
M P
MP
D000818:Animals; D001641:Bicuspid / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006736:Horses / Q000002:abnormalities*; D008297:Male; D008437:Maxilla / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D008443:Maxillary Sinus / Q000002:abnormalities; D009296:Nasal Cavity / Q000002:abnormalities; D009300:Nasal Septum / Q000002:abnormalities; D014057:Tomography, X-Ray Computed / Q000662:veterinary