Nomograms can outperform experts in predicting additional axillary nodal metastases in clinical N0 breast cancer patients with a positive sentinel node biopsy.
In ACOSOG Z0011, prior analysis showed radiation (RT) fields showed that half of all patients with confirmed RT fields used high tangents and 19% include regional nodal irradiation. We sought to evaluate two hypotheses in this secondary analysis:
1. Nomograms are valid in Z0011 and confirm similar distribution of nodal risk in two treatment arms;
2. Radiation fields including lymph nodes were not in the highest risk patients despite best clinical judgment.
I presented this research October 24, 2018 at the American Society for Radiation Oncology (ASTRO) Annual Meeting in San Antonio, Texas.