Dieulafoy's disease of the colon: an unusual cause of digestive bleeding.

Dieulafoy's disease is an unusual cause of gastrointestinal hemorrhage, rep orted to account for less than 2 % of acute gastrointestinal bleeding episo des. Bleeding occurs from a defect in an unusually large submucosal artery, through a minute mucosal erosion. Endoscopic diagnosis is sometimes diffic ult, but primary endoscopic therapy may be successful and should be attempt ed. In most cases the lesion is found in the proximal stomach. Sixteen case s of Dieulafoy's lesion located in the colon have been reported in the lite rature but only nine have been confirmed by histology. We present the case of a 63 year-old male with Dieulafoy's lesion of the tr ansverse colon which was diagnosed by endoscopy and confirmed by histology.