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Node-related factors and survival in node-positive breast carcinomas
Efthimios Sivridis1, Alexandra Giatromanolaki, George Galazios
1Department of Pathology, Democritus University of Thrace Medical School, P.O. Box 128, Alexandroupolis 68100, Greece. esivrid@med.duth.gr
Breast (Edinburgh, Scotland)
|September 2, 2005
Summary
The number of positive lymph nodes is key for breast cancer prognosis. Beyond this, intranodal necrosis and extranodal vascular involvement are significant independent prognostic factors in node-positive breast cancer.
Area of Science:
- Oncology
- Pathology
- Breast Cancer Research
Background:
- The number of positive lymph nodes (+LNs) is the sole recognized node-related prognostic factor in breast cancer staging.
- Existing staging systems may not fully capture the prognostic implications of other lymph node characteristics.
Purpose of the Study:
- To investigate additional node-related prognostic factors beyond the number of positive lymph nodes in node-positive breast carcinomas.
- To identify novel pathological features within lymph nodes that impact patient prognosis.
Main Methods:
- Analysis of 134 patients with infiltrating ductal carcinomas and axillary +LNs treated with modified radical mastectomy.
- Evaluation of metastatic lymph nodes for traditional factors (number, extranodal extension) and novel features (tumor burden, necrosis, stromatogenesis, vascular involvement, matting).
- Multivariate analysis to determine independent prognostic significance of identified features.
Main Results:
- Reaffirmed prognostic significance of 1-3 vs. 4-7 positive lymph nodes, identifying 4+ LNs as a potential cut-off for aggressiveness.
- Extensive nodal tumor burden, extensive nodal necrosis, extensive nodal stromatogenesis, extranodal spread, extranodal vascular involvement, and matted lymph nodes were associated with poorer prognosis.
- Multivariate analysis identified intranodal necrosis and extranodal vascular involvement as significant independent prognostic factors.
Conclusions:
- Node-related pathological features significantly influence prognosis in node-positive breast cancer.
- Intranodal necrosis and extranodal tumor emboli (vascular involvement) are critical prognostic indicators.
- These findings suggest incorporating intranodal necrosis and extranodal vascular involvement into treatment design alongside the number of positive lymph nodes.