This is an exploratory study to compare activity and safety in 400 patients with previously untreated metastatic carcinoma of the colon treated with UFOX (a combination regimen of UFT® (Tegafur plus Uracil), Oxaliplatin, Folinic Acid) plus Cetuximab or FOLFOX-4 (a combination regimen of 5 Fluorouracil (5-FU), Oxaliplatin and Folinic Acid) plus Cetuximab)