Despite the low number of samples from HER2 positive patients available for this analysis, there were no obvious differences in the expression of PREX1 (Figure 5G) and MMP10 (Figure 5H) in this breast cancer subtype (p > 0.05, n = 18), nor a significant correlation between PREX1 and MMP10 expression could be found (r = 0.17; p > 0.05) (Figure 5I). This evidence concerns the gene ERBB2 and breast cancer.