Minimally Invasive Endoscopic Resection of Esophageal Leiomyoma in a Dog

A 13-year-old neutered male Maltese presented with decreased appetite, weight loss, and severe ptyalism.Thoracic radiography and computed tomography (CT) revealed a round, well-marginated intraluminal mass (1.8 × 1.6 × 1.2 cm) originating from the caudal esophageal wall and extending into the lumen.Concurrent endoscopic examination confirmed the presence of a solitary, round, pedunculated intraluminal mass.The mass was successfully removed using snare polypectomy.Histopathological evaluation and immunohistochemical staining confirmed the diagnosis of esophageal leiomyoma.Follow-up endoscopy performed 7 days later revealed no evidence of a residual mass or other adverse effects, except for mild esophagitis.Following tumor resection, the clinical signs improved rapidly and resolved completely.This case report describes an uncommon esophageal leiomyoma in a dog managed using a minimally invasive, non-surgical endoscopic approach, resulting in complete clinical remission.Given the technical challenges associated with surgical access to the esophagus, endoscopic resection may represent a clinically useful and less invasive alternative for the management of benign esophageal tumors.