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Intraoperative Assessment of Resection Margins in Oral Cavity Cancer: This is the Way
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Published on: May 10, 2021

Factors affecting circumferential resection margin involvement after rectal cancer excision.

Henry S Tilney1, Paris P Tekkis, Parvinder S Sains

  • 1Department of Biosurgery and Surgical Technology, Imperial College London, St. Mary's Hospital, London, United Kingdom.

Diseases of the Colon and Rectum
|November 23, 2006
PubMed
Summary

Circumferential resection margin involvement in rectal cancer excision is more frequent with lymph-node-positive tumors and abdominoperineal excision. This finding remained consistent across surgical units, highlighting key factors in rectal cancer surgery outcomes.

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Area of Science:

  • Colorectal surgery
  • Surgical oncology
  • Rectal cancer research

Background:

  • Circumferential resection margin (CRM) involvement is a critical factor influencing rectal cancer prognosis.
  • Understanding factors affecting CRM rates is essential for improving surgical outcomes.

Purpose of the Study:

  • To identify factors predicting CRM involvement in rectal cancer excision.
  • To examine the association between CRM rates for anterior resection (AR) and abdominoperineal excision (AP) within surgical units.
  • To analyze trends in CRM outcomes across different surgical centers.

Main Methods:

  • Retrospective analysis of 1,430 rectal cancer excisions from 2000-2003 using the Association of Coloproctology of Great Britain and Ireland database.
  • Multivariate logistic regression identified independent predictors of CRM involvement.
  • Pearson correlation assessed the relationship between AR and AP CRM involvement rates.

Main Results:

  • CRM involvement rates were 6.7% for AR (n=794) and 17.6% for AP (n=521), with significant between-hospital variability.
  • T stage, nodal involvement, and operative procedure were independent predictors of CRM involvement.
  • Units with high CRM rates for AR also showed high rates for AP (Pearson correlation=0.349, P=0.01).

Conclusions:

  • CRM involvement is significantly more common in lymph-node-positive rectal tumors.
  • Abdominoperineal excision is associated with higher CRM involvement rates compared to anterior resection.
  • The relationship between CRM involvement and tumor/procedural factors is consistent across surgical units.