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Colonic arteriovenous malformation
- ... small artery and vein. This is called an arteriovenous malformation. Bleeding can occur from this area in the colon wall. Other causes include certain heart and lung ...
- ... sometimes referred to as the left, or sigmoid colon. ... tissue or tumors Bleeding, due to diverticulosis or arteriovenous malformations Injuries Cancer Precancerous polyps Familial polyposis Infection, due to diverticulitis