<P> The following are possible causes of a LGIB: </P> <Ul> <Li> Diverticular disease--diverticulosis, diverticulitis </Li> <Li> Colitis <Ul> <Li> Ischaemic colitis </Li> <Li> Infectious colitis </Li> <Li> Pseudomembranous colitis </Li> <Li> Radiation colitis <Ul> <Li> E. coli O157: H7 </Li> <Li> Shigella </Li> <Li> Salmonella </Li> <Li> Campylobacter jejuni </Li> </Ul> </Li> </Ul> </Li> <Li> Hemorrhoids </Li> <Li> Neoplasm--such as colorectal cancer </Li> <Li> Angiodysplasia </Li> <Li> Bleeding from a site where a colonic polyp was removed </Li> <Li> Inflammatory bowel disease such as Crohn's disease or ulcerative colitis </Li> <Li> Rectal varices </Li> <Li> Coagulopathy--specifically a bleeding diathesis </Li> <Li> Anal fissures </Li> <Li> Rectal foreign bodies </Li> <Li> Mesenteric ischemia </Li> <Li> NSAIDs </Li> <Li> Entamoeba histolytica </Li> <Li> Stercoral ulceration </Li> <Li> Dieulafoy lesion (rare) </Li> </Ul> <Li> Diverticular disease--diverticulosis, diverticulitis </Li> <Li> Colitis <Ul> <Li> Ischaemic colitis </Li> <Li> Infectious colitis </Li> <Li> Pseudomembranous colitis </Li> <Li> Radiation colitis <Ul> <Li> E. coli O157: H7 </Li> <Li> Shigella </Li> <Li> Salmonella </Li> <Li> Campylobacter jejuni </Li> </Ul> </Li> </Ul> </Li>

Most common cause of lower gi bleed in india