Upon treatment of PCa cells with the CM from AREG‐expressing PSC27 (PSC27AREG), we observed rapid phosphorylation of EGFR (Y845), Akt (S473), and mTOR (S2448), suggesting activation of the PI3K/Akt/mTOR pathway by AREG (Figure 3a). Here, EGFR is linked to posterior cortical atrophy.