In addition, molecular typing characteristics still need to be evaluated in conjunction with conventional or established gold criteria such as imaging and pathology.Secondly, the consistency of molecular typing between relapsed and metastatic tumor and primary tumor was not examined in this study, as there have been reported the rate of subtype conversion was 0% in basal-like tumors, 23.1% in HER2-enriched tumors, 30.0% in Luminal B tumors, and 55.3% in Luminal A tumors (55). Here, ERBB2 is linked to metastatic neoplasm.