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Related Experiment Videos

Changes in the rectal mucosa induced by hypertonic enemas.

M Leriche, G Devroede, G Sanchez

    Diseases of the Colon and Rectum
    |May 1, 1978
    PubMed
    Summary

    Hypertonic enemas can alter rectal mucosa appearance, mimicking ulcerative colitis. Histologic analysis of biopsies reliably identifies enema reactions, distinguishing them from disease.

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    Area of Science:

    • Gastroenterology
    • Histopathology

    Background:

    • Rectal mucosa changes after hypertonic enemas can be mistaken for quiescent ulcerative colitis.
    • Establishing clear diagnostic criteria for enema reactions is crucial.

    Purpose of the Study:

    • To define diagnostic criteria for hypertonic enema reactions in rectal mucosa.
    • To differentiate enema-induced changes from ulcerative colitis.

    Main Methods:

    • Retrospective analysis to derive criteria, prospectively tested on 11 healthy volunteers.
    • Macroscopic and microscopic evaluation of rectal biopsies before and after sodium phosphate hypertonic enema.
    • Blind assessment by three observers grading features and making diagnoses.

    Main Results:

    • Histologic diagnoses correctly identified enema effects, though macroscopic appearance was sometimes misclassified.
    • Key features of enema reaction include mucous depletion, increased mucosal fragility, lamina propria edema, and basal membrane straightening.
    • Focal erythrocytes in the lamina propria were observed in 39% of cases.

    Conclusions:

    • The effects of hypertonic enemas on rectal mucosa are recognizable on biopsy.
    • Histologic examination is essential for accurate diagnosis, differentiating enema reactions from ulcerative colitis.

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