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Related Experiment Videos

Yield of rescreening for colonic polyps using flexible sigmoidoscopy

B Krevsky1, R S Fisher

  • 1Department of Medicine, Temple University School of Medicine, Philadelphia, Pennsylvania.

The American Journal of Gastroenterology
|August 1, 1994
PubMed
Summary

Repeat flexible sigmoidoscopy after a negative exam yields polyps in 7.2% of cases. This screening supports guidelines and suggests reconsidering age cutoffs for polyp detection.

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Area of Science:

  • Gastroenterology
  • Preventive Medicine
  • Oncology

Background:

  • Flexible sigmoidoscopy is a key screening tool for colorectal polyps.
  • Previous guidelines recommended repeat screening after a negative initial examination.

Purpose of the Study:

  • To evaluate the yield of repeat flexible sigmoidoscopy one year after a negative initial screening examination.
  • To assess polyp recurrence in patients with prior polyps.

Main Methods:

  • A 3-year flexible sigmoidoscopy screening program was conducted.
  • Workers aged 40+ underwent initial screening; those with negative results were offered 1-year follow-up.
  • Data on polyp detection rates at initial and follow-up examinations were analyzed.

Main Results:

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  • Of 69 individuals with a negative initial exam, 7.2% had polyps upon 1-year follow-up.
  • Two of these five patients were under 50 years old.
  • Among those with polyps initially, 33% had recurrent polyps at follow-up.

Conclusions:

  • Repeat flexible sigmoidoscopy after a negative initial exam detects a significant number of polyps (7.2%).
  • This finding supports existing guidelines for 1-year repeat screening.
  • The high detection rate in younger individuals suggests current age cutoffs for screening may be too stringent.