Treatment of a poorly differentiated sarcoma in the oropharynx of a horse

Summary A 10‐year‐old Thoroughbred mare was referred to Tennessee Equine Hospital for evaluation and treatment of a subepiglottic mass. Physical and laboratory examinations revealed no other abnormalities. The tumour was excised through a laryngotomy site using transendoscopic laser and sharp excision. Histological evaluation revealed a poorly differentiated sarcoma with features of a leiomyosarcoma, a rarely identified neoplasm in the oropharynx of the horse. The mare developed intermittent dorsal displacement of the soft palate ( iDDSP ) after surgery but was able to resume full training. There was no evidence of regrowth 8 months post‐operatively.