Achievement of Improved Survival by Molecular Targeted Chemotherapy and Liver Resection for Not Optimally Resectable Colorectal Liver Metastases

The purpose of this study is to evaluate efficacy and safety of mFOLFOX6+bevacizumab and mFOLFOX6+cetuximab for liver only metastasis from KRAS Exon 2 wild type (under protocol 1.0-1.2 edition) and RAS wild type (under protocol 2.0 edition) colorectal cancer.