A logistic regression model predicting high axillary tumour burden in early breast cancer patients. Barco, I., García Font, M., García-Fernández, A., Giménez, N., Fraile, M., Lain, J. M., Vallejo, E., González, S., Canales, L., Deu, J., Vidal, M. C., Rodríguez-Carballeira, M., Pessarrodona, A., & Chabrera, C. Clinical & Translational Oncology: Official Publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico, 19(11):1393–1399, 2017. doi abstract bibtex PURPOSE: As elective axillary dissection is loosing ground for early breast cancer (BC) patients both in terms of prognostic and therapeutic power, there is a growing interest in predicting patients with (nodal) high tumour burden (HTB), especially after a positive sentinel node biopsy (SNB) because they would really benefit from further axillary intervention either by complete lymph-node dissection or axillary radiation therapy. METHODS/PATIENTS: Based on an analysis of 1254 BC patients in whom complete axillary clearance was performed, we devised a logistic regression (LR) model to predict those with HTB, as defined by the presence of three or more involved nodes with macrometastasis. This was accomplished through prior selection of every variable associated with HTB at univariate analysis. RESULTS: Only those variables shown as significant at the multivariate analysis were finally considered, namely tumour size, lymphovascular invasion and histological grade. A probability table was then built to calculate the chances of HTB from a cross-correlation of those three variables. As a suggestion, if we were to follow the rationale previously used in the micrometastasis trials, a threshold of about 10% risk of HTB could be considered under which no further axillary treatment is warranted. CONCLUSIONS: Our LR model with its probability table can be used to define a subgroup of early BC patients suitable for axillary conservative procedures, either sparing completion lymph-node dissection or even SNB altogether.
@article{barco_logistic_2017,
title = {A logistic regression model predicting high axillary tumour burden in early breast cancer patients},
volume = {19},
issn = {1699-3055},
doi = {10.1007/s12094-017-1737-8},
abstract = {PURPOSE: As elective axillary dissection is loosing ground for early breast cancer (BC) patients both in terms of prognostic and therapeutic power, there is a growing interest in predicting patients with (nodal) high tumour burden (HTB), especially after a positive sentinel node biopsy (SNB) because they would really benefit from further axillary intervention either by complete lymph-node dissection or axillary radiation therapy.
METHODS/PATIENTS: Based on an analysis of 1254 BC patients in whom complete axillary clearance was performed, we devised a logistic regression (LR) model to predict those with HTB, as defined by the presence of three or more involved nodes with macrometastasis. This was accomplished through prior selection of every variable associated with HTB at univariate analysis.
RESULTS: Only those variables shown as significant at the multivariate analysis were finally considered, namely tumour size, lymphovascular invasion and histological grade. A probability table was then built to calculate the chances of HTB from a cross-correlation of those three variables. As a suggestion, if we were to follow the rationale previously used in the micrometastasis trials, a threshold of about 10\% risk of HTB could be considered under which no further axillary treatment is warranted.
CONCLUSIONS: Our LR model with its probability table can be used to define a subgroup of early BC patients suitable for axillary conservative procedures, either sparing completion lymph-node dissection or even SNB altogether.},
language = {eng},
number = {11},
journal = {Clinical \& Translational Oncology: Official Publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico},
author = {Barco, I. and García Font, M. and García-Fernández, A. and Giménez, N. and Fraile, M. and Lain, J. M. and Vallejo, E. and González, S. and Canales, L. and Deu, J. and Vidal, M. C. and Rodríguez-Carballeira, M. and Pessarrodona, A. and Chabrera, C.},
year = {2017},
pmid = {28808943},
keywords = {Article, Axilla, Breast neoplasms, Ginecologia, Mortality, Sentinel lymph node biopsy, Survival, Tumour burden},
pages = {1393--1399},
}
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METHODS/PATIENTS: Based on an analysis of 1254 BC patients in whom complete axillary clearance was performed, we devised a logistic regression (LR) model to predict those with HTB, as defined by the presence of three or more involved nodes with macrometastasis. This was accomplished through prior selection of every variable associated with HTB at univariate analysis. RESULTS: Only those variables shown as significant at the multivariate analysis were finally considered, namely tumour size, lymphovascular invasion and histological grade. A probability table was then built to calculate the chances of HTB from a cross-correlation of those three variables. As a suggestion, if we were to follow the rationale previously used in the micrometastasis trials, a threshold of about 10% risk of HTB could be considered under which no further axillary treatment is warranted. 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