Patients with high AREG had longer OS compared with low AREG (HR: 0.227, 95% CI: 0.095-0.808)....Our study has shown that higher T/NT ratios of ERBB2, MET and VEGFA mRNA were associated with worse OS in mCRC patients treated with anti-EGFR antibodies, with higher EREG and AREG were associated with better prognosis in the same setting.