ERBB2 and breast cancer: The AUC of the prognostic risk model in the validation cohort were 0.736 and 0.741 for luminal BC, 0.648 and 0.661 for HER2+ BC at 3 and 5 years, and 0.66 and 0.642 for TNBC at 1 and 3 years, respectively (Figure 5H, Figure 6H and Figure 7H).