ERBB2 and neoplasm: Regarding molecular subtypes, tumor biology is one of the strongest parameters to predict positive axillary lymph nodes after NAC [52], and in the present study, it was observed that the probability of RD in ALND was lower for HER2-enriched and TN tumors in comparation with HR+ tumors for SLN-R ≤ 0.35 values (Figure 2D).