Temporohyoid osteoarthropathy most often affects horses bilaterally. Both ceratohyoid ostectomy and stylohyoid ostectomy are effective treatments. Temporohyoid osteoarthropathy (THO) is a disorder of the petrous-temporal and stylohyoid bones. Common clinical signs include facial and vestibulocochlear nerve dysfunction and head tossing, and less common signs include dysphagia and seizures. Diagnosis is based on clinical signs, guttural pouch endoscopy, skull radiographs, and computed tomography (CT).
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