ERBB2 and neoplasm: Tumor size, pathological type, histological grade, LN status, ER status, PR status, Ki67 level, molecular subtype, surgery of the breast, surgery of the axilla, adjuvant chemotherapy, adjuvant radiotherapy, and adjuvant endocrine therapy were differently distributed among patients with no recurrence, LRR, and DM in the univariate model (all p < 0.05; Table 1), while no difference was observed in age, menopausal status, HER2 status, or adjuvant targeted therapy among three groups (p > 0.05).