What causes lower GI bleeding (LGIB)?

Updated: Jul 26, 2019
  • Author: Burt Cagir, MD, FACS; Chief Editor: BS Anand, MD  more...
  • Print

Comprehensive knowledge of the etiology of lower gastrointestinal bleeding (LGIB) is essential for patient management and, ultimately, for patient outcome. Colorectal polyps/neoplasms, Dieulafoy lesion, inflammatory bowel disease (IBD), and anorectal conditions are the most common etiologies of acute severe LGIB.

The diagram below provides an outline of the most common causes of LGIB, including anatomic (eg, diverticular bleeding), vascular (eg, angiodysplasia, ischemic colitis, radiation-induced colitis), neoplasms, and inflammatory.

Types of lower gastrointestinal bleeding (LGIB). Types of lower gastrointestinal bleeding (LGIB).

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!