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Related Experiment Videos

Credentialing for breast lymphatic mapping: how many cases are enough?

H S Cody1, A D Hill, K N Tran

  • 1Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York City, New York 10021, USA.

Annals of Surgery
|May 11, 1999
PubMed
Summary

Surgeon experience significantly improves sentinel lymph node (SLN) biopsy success rates for breast cancer, reducing both mapping failures and false negatives. Early experience requires careful case selection and combined techniques to minimize errors.

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Area of Science:

  • Oncology
  • Surgical Oncology
  • Breast Cancer Research

Background:

  • Sentinel lymph node (SLN) mapping is crucial for staging early-stage breast cancer.
  • Accurate SLN identification reflects axillary node status, guiding treatment decisions.
  • Existing studies often lack sufficient data to assess surgeon credentialing for SLN mapping.

Purpose of the Study:

  • To evaluate the impact of surgical experience on credentialing for sentinel lymphatic mapping in breast cancer.
  • To determine success and false-negative rates associated with surgeon learning curves for SLN biopsies.

Main Methods:

  • A retrospective analysis of 500 consecutive SLN biopsies performed by eight surgeons over 20 months.
  • Utilized isosulfan blue dye and technetium-labeled sulfur colloid for lymphatic mapping.

Related Experiment Videos

  • Correlated surgeon success and false-negative rates with the number of cases performed.

    • Main Results:

    • Experienced surgeons achieved higher SLN mapping success rates (94%) compared to less experienced ones (86%).
    • Failed mapping procedures decreased with experience but did not disappear entirely.
    • The overall false-negative rate was 10.6%, significantly reduced to 5.2% when excluding the initial six cases per surgeon.

    Conclusions:

    • Increasing surgical experience reduces sentinel lymph node localization failures and false-negative biopsy rates.
    • Combined dye and isotope localization, advanced histopathology, and backup axillary dissection are vital.
    • Judicious case selection is essential to mitigate the higher false-negative rates encountered during early surgical experience.