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Axillary lymph node dissection: is it required in T1a breast cancer?
A J Chontos1, D P Maher, E R Ratzer
1Department of Surgical Education, St. Joseph Hospital, Denver, CO 80218, USA.
Journal of the American College of Surgeons
|May 1, 1997
Summary
Routine axillary lymph node dissection may not be necessary for T1a breast cancer. Our study found a low incidence of metastasis, supporting a move away from this standard procedure for early-stage breast cancer.
Area of Science:
- Oncology
- Surgical Oncology
- Breast Cancer Research
Background:
- Current practice often involves axillary lymph node dissection for T1a breast cancer (tumors ≤5 mm).
- There is ongoing debate regarding the necessity of this procedure for very early-stage breast cancer.
Purpose of the Study:
- To evaluate the incidence of axillary lymph node metastases in T1a breast cancer.
- To determine if routine axillary lymph node dissection is warranted for T1a breast cancer.
Main Methods:
- Retrospective review of 2,242 breast cancer cases from 1987-1994.
- Analysis of 74 T1a breast cancers, with axillary lymph node dissection performed in 66 patients.
- Comparison with other institutional data and SEER Program data.
Main Results:
- Axillary lymph node metastases were found in 4.5% (3 of 66) of T1a breast cancers in this single institution.
- Combined data from single institutions showed a 3.9% metastasis rate.
- Discrepancies noted with SEER data, potentially due to methodological differences.
Conclusions:
- The low incidence of axillary lymph node metastases (3.9%) in T1a breast cancer suggests improved early detection methods.
- Routine axillary lymph node dissection may be safely abandoned for T1a breast cancer.
- Further investigation into screening and detection impacts on metastasis rates is warranted.