<prompt> Intestinal angiodysplasia involvesAV malformationCavernous hemangiomaCavernous hemangiomaMalignant tumor  <response>: Colonic aeriovenous malformation AVM is one of the causes of lower GI bleeding. Unlike small vascular ectasia or angiodysplasia, colonic AVM tends to be solitary, large in size, and identified endoscopically as flat or as an elevated bright red lesion. REFERANCE.MEDSCAP.COM 