Lower gastrointestinal bleeding, commonly abbreviated LGIB, is any form of gastrointestinal bleeding in the lower gastrointestinal tract. LGIB is a common reason for seeking medical attention at a hospital's emergency department.[1] LGIB accounts for 30–40% of all gastrointestinal bleeding and is less common than upper gastrointestinal bleeding (UGIB).[2] It is estimated that UGIB accounts for 100–200 per 100,000 cases versus 20–27 per 100,000 cases for LGIB.[3] Approximately 85% of lower gastrointestinal bleeding involves the colon, 10% are from bleeds that are actually upper gastrointestinal bleeds, and 3–5% involve the small intestine.[4]
^Cite error: The named reference HN was invoked but never defined (see the help page).
^Gralnek, IM; Neeman, Z; Strate, LL (March 2017). "Acute Lower Gastrointestinal Bleeding". New England Journal of Medicine (Review). 376 (11): 1054–63. doi:10.1056/NEJMcp1603455. PMID 28296600. S2CID 44539833.
^Farrell JJ, Friedman LS (June 2001). "Gastrointestinal bleeding in the elderly". Gastroenterol. Clin. North Am. 30 (2): 377–407, viii. doi:10.1016/s0889-8553(05)70187-4. PMID 11432297.
^Dutta G, Panda M (2008). "An uncommon cause of lower gastrointestinal bleeding: a case report". Cases J. 1 (1): 235. doi:10.1186/1757-1626-1-235. PMC 2577108. PMID 18851756.
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