Article
Evidence of occipitoatlantoaxial malformations independent of the HOXD3 mutation in an Arabian horse.
Journal of equine veterinary science - 1 Jul 2026
Vanderbiest Lola, Rousseau Lola, Renaville Benedicte, Aleman Monica, Finno Carrie, Milan Alessandro, Vinardell Tatiana
Abstract excerpt
Occipitoatlantoaxial malformations (OAAM) are developmental disorders occurring at the occiput, atlas and axis. OAAM type 1 is a familial disorder affecting Arabian horses. Currently, a single genetic mutation in the HOXD3 gene region can be tested to confirm the diagnosis. This case describes a 3-year-old Arabian gelding affected with OAAM. Clinical examination revealed a proximal cervical deformation on the...
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