A Successfully Operated Case of Arteriovenous Malformation in the Colon with Massive Melena

Abstract

Arteriovenous malformation of the colon causing gastrointestinal bleeding is considered to be very rare because routine barium contrast studies and endoscopy fail to demonstrate the lesion. In the Japanese literature, only 11 cases, including the present one, have been reported. Meyer identified 218 patients with arteriographically documented arteriovenous malformations, including his own 22 cases. Recently, we experienced a case of arteriovenous malformation of the right colon causing gastrointestinal bleeding and obtained specific findings arteriographically. The patient was operated on successfully.