Cause analysis of lower gastrointestinal hemorrhage

Objective To appraise the causes and characteristics of lower gastrointestinal tract hemorrhage(LGB).Methods An analysis was made from the clinical records of 1431 patients with LGB diagnosed by endoscopy in our department during 2000-2003.Results The data showed that the main causes of LGB were as follows: colo-rectal carcinoma(392 cases, 27.4% ), colorectal polyps (294 cases, 20.5% ), perianal abnormality or Crissum's disease (231 cases, 16.1% ), inflammatory bowel disease(IBD,88 cases, 6.1% ) and colitis (44 cases, 3.1% ), etc. The morbidity of large bowel cancer in the elderly and middle-aged groups were obviously higher than that of the other age groups. LGB in the youth group was mainly due to polyps while IBD and perianal lesion or Crissum’s disease were some what the higher cause of LGB.Conclusion Large intestine carcinoma, polyps, Crissum's disease, IBD and colitis are the main causes of LGB, with correlation to age and gender.