Massive lower gastrointestinal hemorrhage caused by pseudocyst of the pancreas ruptured into the colon. Report of two cases.

We report two cases of massive lower gastrointestinal (LGI) bleeding occurring in young adult men, as the first manifestation of pseudocyst of the pancreas. Despite the rarity of such a complication, pancreatic pseudocyst should be kept in mind as a possible source of massive LGI bleeding requiring immediate surgical treatment.