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A current approach to rectal bleeding

S L Levinson, D W Powell, W T Callahan

    Journal of Clinical Gastroenterology
    |January 1, 1981
    PubMed
    Summary
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    Diagnosing the source of moderate to severe rectal bleeding is challenging. Most cases originate in the colon (85%), often due to diverticulosis or vascular dysplasia, requiring a structured diagnostic and therapeutic approach.

    Area of Science:

    • Gastroenterology
    • Clinical Medicine

    Background:

    • Identifying the source of moderate to severe rectal bleeding is clinically challenging.
    • Lesions causing rectal bleeding can be located throughout the gastrointestinal tract.

    Purpose of the Study:

    • To review the literature and clinical data on the origins of moderate to severe rectal bleeding.
    • To present a classification and therapeutic approach for patients with rectal bleeding.

    Main Methods:

    • Literature review of available studies on rectal bleeding.
    • Analysis of reported clinical data regarding bleeding sources.
    • Classification of patients based on bleeding patterns (spontaneous, recurrent, persistent).

    Main Results:

    • Upper gastrointestinal sources account for up to 10% of moderate to severe rectal bleeding.

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  • Small bowel sources account for up to 5% of cases.
  • Colonic sources account for the majority (85%), with diverticulosis and vascular dysplasia being common (30-50%).
  • Inflammatory bowel disease and ischemic colitis contribute 5-15% of colonic bleeding.
  • A diagnosis remains elusive in 20-30% of patients.

    • Conclusions:

    • A significant proportion of moderate to severe rectal bleeding originates from the colon.
    • A systematic approach to diagnosis and therapy, considering bleeding patterns, is essential.
    • Further research may be needed for undiagnosed cases.