From the analysis of TRAF6 expressions in various molecular subtypes of breast cancer tissues, moreover, TRAF6 protein and mRNA levels were both found to be higher in TNBC than in human epidermal growth factor receptor 2 overexpressed (HER2+) and hormone receptor positive (HR+) breast cancers by qRT‐PCR and immunohistochemistry, respectively (Figure 1C,D). This evidence concerns the gene ERBB2 and breast cancer.