Limited Supraclavicular Radiation Field in Breast Cancer With ≥ 10 Positive Axillary Lymph Nodes

ASR was the most prevalent locoregional recurrence pattern in patients with breast cancer with ≥ 10 axillary LN metastases, and LNR was a significant prognostic factor for the development of ASR. Modification of the SCRT field, including the full axilla, should be considered in patients with a greater LNR.