Abstract
Organizer: 中华医学会消化内镜分会; CLC: R573.2; R815; Obscure GI bleeding is defined as bleeding from the Gitract that persists or recurs without an obvious etiology after esophagogastroduodenoscopy (EGD), coionoscopy,and radiologic evaluation of the small bowel, such as,small bowel follow-through or enteroclysis.Overt obscure GI bleeding which is clinically manifestand occult obscure GI bleeding presenting with fecaloccult blood positivity and usually, but not necessarily,with iron deficiency anemia.