Abstract
A 51-year-old man presented to the gastroenterology department with a history of abdominal discomfort. Computed tomography was unremarkable. Upper gastrointestinal endoscopy showed a submucosal mass lesion at the esophagus, with a 36cm distance from the incisors. The esophageal submucosal mass lesion with mixed echo was confirmed by endoscopic ultrasound (EUS). Endoscopic submucosal dissection (ESD) was performed, and the mass lesion was resected in a whole piece. Histopathological examination showed lymphatic and blood vessels, which demonstrated an esophageal vascular tumor. Further immunohistochemistry revealed tumor cells that stained positive for CD34 and D2-40.
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