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Mesorectal excision for rectal cancer

J K MacFarlane1, R D Ryall, R J Heald

  • 1University of British Columbia, Vancouver, Canada.

Lancet (London, England)
|February 20, 1993
PubMed
Summary
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Total mesorectal excision (TME) surgery alone significantly reduces local recurrence in rectal cancer. This meticulous surgical technique offers superior outcomes compared to adjuvant therapies, improving cure rates for rectal cancer patients.

Area of Science:

  • Surgical Oncology
  • Gastrointestinal Surgery
  • Rectal Cancer Research

Background:

  • High local recurrence rates (20-45%) in rectal cancer necessitate evaluating treatment efficacy.
  • Proliferation of adjuvant therapies raises questions about the role of surgery alone.
  • Total mesorectal excision (TME) is a surgical technique aiming to minimize local recurrence.

Purpose of the Study:

  • To review the efficacy of total mesorectal excision (TME) without adjuvant therapy.
  • To compare TME outcomes with conventional surgery plus radiotherapy or chemoradiotherapy.
  • To assess the impact of meticulous TME on rectal cancer cure rates.

Main Methods:

  • Independent analysis of prospective follow-up data for TME surgery over 13 years (1978-1991).

Related Experiment Videos

  • Comparison of TME results with North Central Cancer Treatment Group (NCCTG) data for high-risk cases.
  • Inclusion of 135 consecutive Dukes' B (B2) and C rectal cancer operations below 12 cm from the anal verge.

    • Main Results:

    • 5-year actuarial local recurrence rate after TME alone was 4%; overall recurrence was 18%.
    • TME alone showed substantially superior results to NCCTG data: 5% local recurrence vs. 25% (radiotherapy) and 13.5% (chemoradiotherapy).
    • Overall recurrence rates for TME alone were 22% compared to 62.7% (NCCTG) and 41.5% (chemoradiotherapy).

    Conclusions:

    • Meticulous TME, encompassing the entire tumor spread field, improves rectal cancer cure rates.
    • TME alone yields superior outcomes to conventional surgery with adjuvant therapies.
    • Enhanced surgical results from TME support more selective use of adjuvant therapies in the future.