The PETACC-8 phase III trial assessed the efficacy of cetux addition to FOLFOX compared to FOLFOX only in pts with resected stage III colon cancer (CC)....Pts with low miR-31-5p levels (n = 233/477, 49%) benefited from cetux on DFS (HR = 0.46 [0.25; 0.84] p = 0.01) and OS (HR = 0.50 [0.25; 0.99], p = 0.047) whereas high expressers did not (DFS: HR = 0.87 [0.56; 1.34] ; OS: HR = 1.01 [0.61; 1.67]).