A total of 884 mCRC patients from six treatment arms of three independent phase III trials....TET3 rs7560688 was associated with TR (OR = 1.44, 95% CI 1.10 – 1.89, P = 0.009, FDR adjusted P=0.062). D. IDH1 rs1437410 was suggestively associated with PFS (HR = 1.15, 95% CI 1.01 – 1.31, P = 0.034, FDR adjusted P=0.14).