Nomograms for Predicting Axillary Response to Neoadjuvant Chemotherapy in Clinically Node-Positive Patients with Breast Cancer

Jose Vila, Elizabeth A. Mittendorf, Gabriel Farante, Roland L. Bassett, Paolo Veronesi, Viviana Galimberti, Nicolas Peradze, Michael C. Stauder, Mariana Chavez-MacGregor, Jennifer F. Litton, Lei Huo, Henry M. Kuerer, Kelly K. Hunt, Abigail S. Caudle

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Abstract

Background: Many patients with clinically node-positive breast cancer receive neoadjuvant chemotherapy (NAC). Recent trials suggest the potential for limiting axillary surgery in patients who convert to pathologically node-negative disease. The authors developed a nomogram to predict axillary response to NAC in patients with cN1 disease that can assist clinicians in treatment planning. Methods: Patients with cT1–4N1M0 breast cancer who received NAC and underwent axillary lymph node dissection from 2001 through 2013 were identified (n = 584). Uni- and multivariate logistic regression analyses were performed to determine factors predictive of nodal conversion. A nomogram to predict the likelihood of nodal pathologic complete response (pCR) was constructed based on clinicopathologic variables and validated using an external dataset. Results: Axillary pCR was achieved for 217 patients (37 %). Patients presenting with high nuclear grade [grade 3 vs. 1, odds ratio (OR) 13.4], human epidermal growth factor receptor 2-positive (OR 4.7), estrogen receptor (ER)-negative (OR 3.5), or progesterone receptor-negative (OR 4.3) tumors were more likely to achieve nodal pCR. These factors, together with clinically relevant factors including presence of multifocal/centric disease, clinical T stage, and extent of nodal disease seen on regional nodal ultrasound at diagnosis were used to create nomograms predicting nodal conversion. The discrimination of the nomogram using ER+ status (>1 % staining) versus ER− status [area under the curve (AUC) 78 %] was improved slightly using the percentage of ER staining (AUC 78.7 %). Both nomograms were validated using an external cohort. Conclusion: Nomograms incorporating routine clinicopathologic parameters can predict axillary pCR in node-positive patients receiving NAC and may help to inform treatment decisions.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalAnnals of Surgical Oncology
DOIs
Publication statusAccepted/In press - May 23 2016

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ASJC Scopus subject areas

  • Surgery
  • Oncology

Cite this

Vila, J., Mittendorf, E. A., Farante, G., Bassett, R. L., Veronesi, P., Galimberti, V., Peradze, N., Stauder, M. C., Chavez-MacGregor, M., Litton, J. F., Huo, L., Kuerer, H. M., Hunt, K. K., & Caudle, A. S. (Accepted/In press). Nomograms for Predicting Axillary Response to Neoadjuvant Chemotherapy in Clinically Node-Positive Patients with Breast Cancer. Annals of Surgical Oncology, 1-9. https://doi.org/10.1245/s10434-016-5277-1