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Studying Triple Negative Breast Cancer Using Orthotopic Breast Cancer Model
Published on: March 20, 2020
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Axillary lymph node micrometastases decrease triple-negative early breast cancer survival
G Houvenaeghel1, R Sabatier1, F Reyal2
1Institut Paoli Calmettes and Centre de Recherche en Cancérologie de Marseille, INSERM U1068, CNRS U7258, 232 Bd Ste Marguerite, Marseille, France.
British Journal of Cancer
|September 30, 2016
Summary
Axillary lymph node involvement (ALNI) significantly impacts survival in early triple-negative breast cancer (TNBC). Even small amounts of cancer cells in lymph nodes are a key prognostic factor, regardless of chemotherapy.
Area of Science:
- Oncology
- Breast Cancer Research
- Cancer Prognostics
Background:
- Triple-negative breast cancer (TNBC) is an aggressive subtype with unclear prognostic markers.
- The prognostic significance of axillary lymph node involvement (ALNI) in TNBC requires further elucidation.
- Focus on small axillary metastases, including occult metastases, is crucial for early-stage TNBC.
Purpose of the Study:
- To investigate the prognostic impact of ALNI in early TNBC.
- To specifically evaluate the role of small axillary metastases (occult vs. macrometastases).
- To identify independent prognostic factors for disease-free survival (DFS) and overall survival (OS) in TNBC.
Main Methods:
- Multicentre study of 1237 patients treated for early TNBC.
- Analysis of clinicopathological data and ALNI, differentiating between macrometastases and occult metastases (isolated tumor cells or micrometastases).
- Exploration of ALNI's prognostic value for DFS and OS.
Main Results:
- Independent prognostic factors for DFS included tumor size >20mm, lymphovascular invasion, and ALNI (both occult and macrometastases).
- DFS and OS were similar between occult metastases and macrometastases.
- Patients with at least two adverse features (ALNI, lymphovascular invasion, large tumor size) had significantly poorer DFS and lower 5-year OS (70% vs. >=90%).
Conclusions:
- Axillary lymph node involvement, including occult metastases, is a critical prognostic factor in early TNBC.
- The prognostic impact of ALNI is independent of chemotherapy administration.
- Identifying patients with multiple adverse features can guide risk stratification and treatment decisions.
