<prompt> Most common cause of lower gastro intestinal bleeding is;DiverticulitisColorectal carcinomaAngiodysplasiaAnal fissure  <response>: Colo.rectal carcioma 1310-CSDT 12th 1160-B L 25th Although diverticulitis, cancer and angiodysplasia are the most common cause of lower GI bleeding in adults 1310-CSDT 12th Diverticular diseases Very common in western countries, though it is quite rare in this country 1104. S.Das 5thDiverticulitis 1161-BLSymptoms and signs of colorectal cancer 1178-B LComplications1. Recurrent periodic abscess2. Perforation leading to general peritonitis3. Intestinal obstruction4. Haemorrhage - profuse colonic haemorrhage5. Fistula formation Diverticulitis is not a precancerous conditions but cancer may coexist Right sided tumour - Iron deficiency anemia, abdominal mass Left sided tumours - rectal bleeding alteration in bowel habit, tenesmus obstruction Metastatic disease - Jaundice, ascitis, hepatomegaly, other symptoms and sign from rarer sites of metastasis. In Infants - anal fissures continue to be the most common cause of rectal bleeding. Juvenile polyps - are the single most common cause of lower GI bleeding in children 20-30 