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Related Experiment Videos

Breast cancer. Experiences with conservation therapy.

R M Clark1, R H Wilkinson, P N Miceli

  • 1Department of Radiation Oncology, Princess Margaret Hospital, Toronto, Ontario, Canada.

American Journal of Clinical Oncology
|December 1, 1987
PubMed
Summary

Breast conservation surgery for node-negative breast cancer offers survival rates comparable to radical surgery. Breast irradiation reduces local recurrence, but regional node irradiation is unnecessary for these patients.

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Area of Science:

  • Oncology
  • Surgical Oncology
  • Radiotherapy

Background:

  • Breast conservation therapy (BCT) is a standard treatment for early-stage breast cancer.
  • The role of axillary dissection and radiation in BCT for node-negative patients requires clarification.

Purpose of the Study:

  • To evaluate the long-term survival and recurrence rates in node-negative breast cancer patients treated with BCT.
  • To assess the impact of axillary dissection and radiation on outcomes.

Main Methods:

  • A retrospective analysis of 1,504 patients with clinically node-negative breast cancer treated with BCT.
  • Long-term follow-up for survival and recurrence patterns.
  • Analysis of the effects of breast irradiation, regional node irradiation, and axillary dissection.

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Main Results:

  • 5-year relative survival was 84%, and 10-year relative survival was 72%, comparable to radical surgery.
  • Breast irradiation significantly reduced breast relapse.
  • Regional node irradiation did not improve survival and was deemed unnecessary.
  • Lumpectomy alone provided equivalent survival to more radical treatments.
  • Younger patients had larger tumors, higher breast relapse risk, and reduced survival.
  • Estrogen receptor (ER) and progesterone receptor (PR) status did not influence relapse.

Conclusions:

  • Lumpectomy alone is an effective treatment for node-negative breast cancer, yielding survival rates similar to radical surgery.
  • Breast irradiation is beneficial for reducing local recurrence, while regional node irradiation is not indicated.
  • Younger age is a significant prognostic factor associated with poorer outcomes.