Most patients with mCRC are treated with palliative chemotherapy and only a small number of patients with limited metastatic disease achieve long-term remission following metastasectomy. There is a growing need for more effective treatment in patients with liver-only mCRC to improve the rate of curative resection without compromising QOL.The current study is informed by our patient's needs. It aims to evaluate the rate of conversion therapy in patients with unresectable liver-only mCRC using the combination of FOLFOXIRI and bevacizumab and to assess the association between an early FDG-PT/CT response and other clinical and pathological biomarkers and hepatic metastasectomy.