EGFR and posterior cortical atrophy: Furthermore, this study identified EGFR in secreted exosomes and provides compelling evidence that circulating EGFR may be constitutive in exosomes and further evaluation of exosomes EGFR in PCa patient serum may identify its role in the resistance of EGFR targeted therapies tested in the clinic against PCa progression (Schematic representation of role of EGFR as shown in Fig 6).