The case is reported of a patient with a formed, sessile, polypoid-type cavernous hemangioma in the ascending colon that was removed successfully by endoscopic mucosal resection.

Colonoscopic examination at that time indicated a submucosal tumor (SMT), 15 mm in diameter, in the ascending colon near Bauhin's valve. Hemangioma was suspected. She was then admitted to our ...