Three of the four genes were overexpressed in breast tumors arising in younger women compared to older women: BUB1 (Fold Change 1.67, p = 0.029), KRT5 (Fold Change 1.56, p = 0.002), and MYCN (Fold Change = 1.16, p = 0.027). Here, BUB1 is linked to breast neoplasm.