500
At 10 years, these outcomes were improved with nodal radiation in "Internal Mammary and Medial Supraclavicular Irradiation in Breast Cancer" [Poortmans et al. NEJM 2015]
What is at 10 years, the rate of disease-free survival was 72.1% in the nodal-irradiation group and 69.1% in the control group (P=0.04), the rate of distant disease-free survival was 78.0% versus 75.0% (P=0.02), and breast-cancer mortality was 12.5% versus 14.4% (P=0.02). OS was 82.3% in the nodal-irradiation group and 80.7% in the control group (P=0.06).