The investigators propose to undertake a feasibility study, including a prospective single arm trial of patients with synchronous colorectal cancer and liver metastases undergoing simultaneous resection to provide us with important information to prepare a large randomized controlled study of simultaneous vs. staged resection. This feasibility study will provide valuable data on the type and proportion of postoperative complications at 90 days following surgery as measured by the comprehensive complication index(Slankamenac 2013) which will help us better understand the postoperative complication rate of the simultaneous approach and also calculate a sample size for a randomized controlled trial based on this primary outcome. This study will also help define the population that should be included in such a trial (all liver resections vs. only major liver resections, etc.). Set criteria for success of this feasibility study will be clearly stated in this proposal in order to determine if it is possible and ethical to move forward with a larger trial. The results of this study could lead to changes in surgical practice by introducing an innovative approach to treat this disease, in a way that could improve patient's quality of life by decreasing postoperative complications and the number of surgical procedures and at the same time lead to cost savings to the health care system.