ERBB2 and breast cancer: Conversely, histological subtype of breast cancer (ER−HER2− vs ER+HER2−: HR: 0.52 [0.32; 0.87] p = 0.01, and HER2+ vs ER+HER2−: HR: 0.51 [0.27; 0.99], p = 0.05), and HRD score (both as a continuous value or dichotomized according to the median value of the cohort; HR: 0.98 [0.97; 1], and HR: 0.62 [0.41; 1.01], respectively, p = 0.05) were associated with better PFS.