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Left-sided stenosing lesions in colonoscopy.

H Aste, V Pugliese, F Munizzi

    Gastrointestinal Endoscopy
    |February 1, 1983
    PubMed
    Summary
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    Colonoscopic examination identified 122 stenotic lesions, most in the sigmoid colon. Adenocarcinoma was a common cause, particularly for protruding masses (Type A), while diverticular disease and cancer caused narrowing (Type B).

    Area of Science:

    • Gastroenterology
    • Endoscopy
    • Colorectal Cancer Research

    Background:

    • Colonic stenosis frequently impedes colonoscopic examinations.
    • Understanding the endoscopic patterns and causes of stenosis is crucial for diagnosis and management.

    Purpose of the Study:

    • To analyze the incidence, endoscopic patterns, causes, and diagnostic accuracy of stenotic lesions encountered during colonoscopy.

    Main Methods:

    • Retrospective analysis of 2625 colonoscopic examinations.
    • Classification of stenotic lesions into two endoscopic patterns (Type A: protruding mass, Type B: gradual narrowing with intact mucosa).
    • Correlation of lesion types with underlying pathologies and diagnostic methods (biopsy, cytology).

    Main Results:

    Related Experiment Videos

    • 122 stenotic lesions (4.6%) interfered with colonoscopy, predominantly in the sigmoid colon (64%).
    • Type A lesions were frequently caused by adenocarcinoma (83%).
    • Type B lesions were associated with diverticular disease (32%) and adenocarcinoma (27%).
    • Colonoscopy with biopsies and cytology showed high accuracy for Type A lesions, but brush cytology was less effective for Type B.

    Conclusions:

    • Colonic stenosis presents distinct endoscopic patterns with different underlying etiologies.
    • Adenocarcinoma is a primary cause of protruding stenotic masses, while diverticular disease and adenocarcinoma contribute to gradual narrowing.
    • Diagnostic strategies should be tailored to the endoscopic appearance of the stenosis.