Study of resection of primary colorectal caner and synchronous liver metastasis after SOX + Bmab

Interventions: S-1 is administered orally at 80mg/m2/day for 14 consecuitive days followed by a 7 day rest. L-OHP is given intravenously on days 1, at a dose of 130mg/m2/day.Bevacizumab is given intravenously on days 1, at a dose of 7.5mg/kg/day. 21 days are assumed 1 course, and chemotherapy consisted of 4 courses. Surgery is carried out in 8 to 12 weeks after the end of chemotherapy.
Primary outcome(s): progression free survival
Study Design: single arm study, open(masking not used), no treatment control/standard of care control, single assignment, treatment purpose