Abstract
We reported a case of Dieulafoy's type ulcer of the rectum. A 77-year-old woman was admitted to our hospital, due to massive lower gastrointestinal bleeding and shock. Colonos-copic findings showed an exposed vessel in the lower rectum. A transanal resection of mucosa was performed. Because the histopathological examination revealed an abnorrnal vessel in the submucosa, we diagnosed Dieuiafoy's type ulcer of the rectum. when we encounter sudden massive rectal bleeding, it is important to keep in mind Dieulafoy's type ulcer of the rectum and choose the reliable treatment for hemostasis.