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Related Experiment Videos

Small polyps found at sigmoidoscopy: are they significant?

T Rokkas1, A Karameris, G Mikou

  • 1Department of Gastroenterology, 401 Army General Hospital, Athens, Greece.

Hepato-Gastroenterology
|October 1, 1993
PubMed
Summary
This summary is machine-generated.

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Small polyps found during flexible sigmoidoscopy, including hyperplastic polyps, indicate a risk for proximal adenomatous polyps. Therefore, all patients with small rectosigmoid polyps require total colonoscopy for complete polyp detection.

Area of Science:

  • Gastroenterology
  • Colorectal Cancer Screening
  • Endoscopy

Background:

  • Flexible sigmoidoscopy is a common screening tool for colorectal cancer.
  • The significance of small polyps, particularly hyperplastic polyps in the rectosigmoid, requires further investigation.
  • Identifying markers for proximal neoplastic lesions is crucial for effective screening.

Purpose of the Study:

  • To evaluate the significance of small polyps detected during screening flexible sigmoidoscopy.
  • To determine if hyperplastic polyps in the rectosigmoid are potential markers for neoplastic polyps located proximally.
  • To assess the risk of proximal adenomatous polyps in patients with small rectosigmoid polyps.

Main Methods:

  • Prospective study of 1500 patients undergoing screening flexible sigmoidoscopy.

Related Experiment Videos

  • Inclusion of 75 patients with small rectosigmoid polyps (excluding those >1 cm, with bleeding history, IBD, or prior polypectomy).
  • All included patients underwent total colonoscopy for polyp removal and histopathological analysis.

    • Main Results:

    • Histopathology revealed 60% hyperplastic polyps and 40% adenomatous polyps among the 75 patients.
    • Among patients with hyperplastic polyps, 35.5% had proximal adenomatous polyps.
    • Among patients with rectosigmoid adenomatous polyps, 30% had more proximal adenomas.

    Conclusions:

    • Polyp size alone is not a reliable predictor of histology.
    • Small rectosigmoid polyps (hyperplastic or adenomatous) are associated with an increased risk of proximal adenomatous polyps.
    • Total colonoscopy is recommended for all patients with small polyps detected during flexible sigmoidoscopy to ensure comprehensive polyp detection.