Functional analysis of the basal subtype found genes related to oncogenic signaling pathways (e.g., ErbB/EGFR, PI3K-AKT, Hippo, and Wnt), EMT (TGFβ pathway), and deregulation of cell differentiation, proliferation, and apoptosis (e.g., YAP1, HEY1, MYC, and E2F7), reflecting the more aggressive nature of the basal tumor subtype. Here, EGFR is linked to neoplasm.