What are causes lower gastrointestinal (GI) bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
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An older patient with diverticular bleeding or angiodysplasia may present with painless bleeding and minimal symptoms. Ischemic colitis, abdominal pain, and varying degrees of bleeding are usually observed in patients with multiple comorbidities such as congestive heart failure (CHF), atrial fibrillation, or chronic renal failure (CRF). LGIB can be mild and intermittent, as often is the case of angiodysplasia and colon carcinoma, or moderate or severe, as may be the situation in diverticula-related bleeding. Colon carcinoma rarely causes significant LGIB.

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