“…The most frequent etiology is diverticulosis and less frequent is bleeding in angiodysplasia, tumors, inflammatory disease, and bleeding from Meckel's diverticulum [4,5]. A separate group comprises hemorrhage from sources outside the digestive tract, such as the biliary tract, the pancreatic duct, and arterioenteric fistula, or visceral arteries aneurysms or pseudoaneurysms [6,7].…”