Recurrent equine laryngeal alteration associated with compression of nerves in the infra-auricular region similar to Eagle Syndrome in humans

A mare presented headshaking, along with signs of problems in the upper respiratory tract. After a detailed clinical examination, an endoscopic examination was performed and an asymmetry was found to the left of the laryngeal cartilages. Searching for a probable etiology for the endoscopic finding, an ultrasound examination was performed in the infra-auricular region (parotid region) bilaterally and comparatively. The ultrasound examination showed a deviation (on the left side) of the nerve bundle corresponding to the deviation of the cartilages and soft palate, from which we associated the findings with the clinical presentation by the mare and concluded that it was the cause of the problem. Comparing this case, specifically, with Eagle Syndrome in humans, the aforementioned findings were very similar to the syndrome in humans.