ERBB2 and breast cancer: In terms of hormonal receptor, ki67 and HER2 statuses, according to the St Gallen international expert consensus [13], there were 8 (6.1%) patients with Luminal A-like breast cancer, 85 (64.9%) were Luminal B-like, among them 32 were HER2 positive and 53 were HER2 negative.