The drug being tested in this study is called Panitumumab. This exploratory study will investigate biomarkers which may be predictors of efficacy and safety of treatment with mFOLFOX6 + bevacizumab versus mFOLFOX6 + panitumumab therapy in patients with chemotherapy-naïve unresectable advanced or recurrent colorectal cancer.~Tumor tissue samples obtained from the participants who enrolled in the safety/efficacy study of Panitumumab + mFOLFOX versus bevacizumab + mFOLFOX (PARADIGM Study: NCT02394795) and provided consent for this additional study will be used. Mutations, amplification and rearrangement of predefined tumor-associated genes will be investigated using DNA collected from tumor samples used for assessing RAS mutations and plasma free DNA collected before administration of cycle 1 and at the discontinuation of the protocol treatment in the main study.
The purpose of this study is to investigate biomarkers which may be predictors of efficacy and safety of treatment with mFOLFOX6 + bevacizumab versus mFOLFOX6 + panitumumab therapy in patients with chemotherapy-naïve unresectable advanced or recurrent colorectal cancer.