A 3-year-old, intact female golden retriever was presented with a sudden onset of inspiratory obstructive dyspnea following general anesthesia to perform a mastectomy. The cuneiform process of the left arytenoid cartilage was found to be extremely mobile on laryngeal examination. Fracture of the cuneiform process of the left arytenoid cartilage was diagnosed. A combined cricoarytenoid and thyroarytenoid caudolateralization procedure was performed on the left side, and no further dyspnea was observed during a follow-up period of 7 months. Fracture of the cuneiform process of the arytenoid cartilage has not been previously reported in dogs. The condition may respond favorably to cricoarytenoid and thyroarytenoid caudolateralization surgery.

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