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Incomplete Polyp Resection Rate of Colorectal Polyps in the Chinese Population: A Cross-Sectional Study.

Song Zhang1,2, Jiahui Wei1,2, Xiangyu Sui1,2

  • 1Department of Gastroenterology, Changhai Hospital, National Clinical Research Center for Digestive Diseases, Naval Medical University, Shanghai, China.

The American Journal of Gastroenterology
|September 29, 2025
PubMed
Summary

The incomplete resection rate (IRR) for colorectal polyps varies significantly, with sessile serrated adenomas/polyps and proximal colon polyps posing higher risks. Increased narrow-band imaging (NBI) experience may reduce the IRR.

Keywords:
colonoscopycolorectal polypsincomplete resection ratesessile serrated adenoma/polyps

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Area of Science:

  • Gastroenterology
  • Endoscopy
  • Surgical Oncology

Background:

  • Colonoscopy is vital for colorectal cancer prevention.
  • Incomplete polyp resection can lead to post-colonoscopy colorectal cancer.
  • Limited data exists on the incomplete resection rate (IRR) and its risk factors.

Purpose of the Study:

  • To evaluate the IRR of colorectal polyps.
  • To identify independent risk factors associated with incomplete polyp resection.

Main Methods:

  • Analysis of data from the National Colorectal Polyp Care study.
  • Inclusion of patients with polyps (1-20 mm) removed during colonoscopy.
  • Biopsies of resection margins to assess completeness; multivariate logistic regression for risk factor analysis.

Main Results:

  • An IRR of 4.4% was observed for 1,944 neoplastic polyps.
  • Sessile serrated adenomas/polyps (SSA/Ps), proximal colon polyps, and lower narrow-band imaging (NBI) experience were independent risk factors for high IRR.
  • IRR varied widely (0% to 36.4%) among endoscopists.

Conclusions:

  • Significant variability exists in polyp resection completeness in clinical practice.
  • SSA/Ps and proximal colon polyps are associated with higher incomplete resection rates.
  • Higher NBI experience may be a protective factor against incomplete polyp resection.