<prompt> Which of the following is the least common possibility about Angiodysplasia of colon?Involvement of cecumInvolvement of rectum in 50 of casesAffecting age group40 yearsCause of troublesome lower GI haemorrhage  <response>: Vascular ectasia Angiodysplasia MC Vascular lesion found in the colon: Vascular ectasia MC cause of recurrent lower Intestinal bleeding after 60 years of age : Vascular ectasia Arise from age- related degeneration of previously normal colonic blood vessels. Acquired condition Almost always occur in the caecum or the proximal ascending colon Usually multiple, are 5mm in diameter Rarely identified with gross inspection or routine pathologic examination Diagnosed with colonoscopy or angiography Angiography : Slow emptying of vein dilation of sub mucosal vessels 