Validation of a New Prognostic Score for Adult Patients With RAS Wild-type mCRC Treated With Vectibix® and FOLFIRI or FOLFOX in First Line (VALIDATE)

Patients will be scheduled to receive first line therapy with the combination of Panitumumab (6 mg / kg i.v, given once every two weeks) and FOLFIRI or FOLFOX, according to current SmPC.