This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
Intestinal angiodysplasia involves 
Select and explain. 
A. AV malformation, B. Cavernous hemangioma, C. Cavernous hemangioma, D. Malignant tumor
A: AV malformation
Answer: A: AV malformation 
Explanation: 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