| [ Summary ] |
Hypovolemic shock due to lower gastrointestinal bleeding is rare. However, massive rectal bleeding is sometimes seen in conditions such as diverticulitis, angiodysplasia, acute hemorrhagic rectal ulcer and ulcer after endoscopic polypectomy. Infectious colitis, ischemic colitis and antibiotic-associated hemorrhagic colitis should be considered as potential causes of acute rectal bleeding with diarrhea. In patients with chronic rectal bleeding, colorectal carcinoma in middle-aged and elderly groups and ulcerative colitis and amoebiasis in younger subjects should be considered as the main causative diseases. |