We also analyzed the association between the level of WNT7A mRNA expression and patients’ prognosis using the existing microarray database and found that higher WNT7A mRNA expression was associated with poor overall survival (OS) of all patients with BC (HR 1.24) and patients with basal-like subtype (HR 1.54) (Additional file 1: Fig. S7B) that is often diagnosed as TNBC and comprises about 50 to 75% of the TN subtype [70]. This evidence concerns the gene WNT7A and breast cancer.