ERBB2 and neoplasm: In the same way, Zhen et al. [12] did not find any association between miR-155 and tumour subtypes, whereas Gwak et al. [14] found that the tissue miR-155 expression was significantly higher in luminal A and TNBC subtypes compared to luminal B, luminal B/HER2 positive and HER2 positive subtypes.