- Arm D: FOLFIRI or FOLFOX (the CT schedule not received in 1st line trial, as described in arm B) plus CETUXIMAB CETUXIMAB 1st cycle Day 1 400 mg/m2 infusion of 120 min 2 hrs before CT infusion 1st cycle Day 8 and subsequent cycles 250 mg/m2 infusion of 60 min 1 hr before CT infusion Patients from arm A and Kras Mutant were treated according to arm C.