This analysis revealed that genes associated with human mammary stem cells were expressed at significantly higher levels in dormant residual tumor cells compared to all other tumor cell types in both the HER2/neu and Wnt1 models (Fig. 4f, h; p value HER2/neu = 2.34E-27; p value Wnt1 = 1.72E−14). This evidence concerns the gene ERBB2 and neoplasm.