EGFR and posterior cortical atrophy: These reciprocal miRNA–mRNA pairings (upregulated miRNA/downregulated mRNA target or downregulated miRNA/upregulated mRNA target, also indicated as up/down or down/up, in AA PCa vs. EA PCa) were demonstrated as key components differentially regulating the activation of ERBB, mTOR, and VEGF signaling pathways in AA PCa vs. EA PCa [14,15].