ERBB2 and neoplasm: Multivariate analysis demonstrated that age (≤45 years vs. >45 years), primary tumor site (lateral region vs. inner and central region), molecular subtype (Luminal A vs. Luminal B vs. Her2 enriched vs. Triple negative), pathological T stage (T1 vs. T2) and positive lymph nodes number (1 vs. 2 vs. 3) were independent factors for LRFS (Table 3).