In my third year of chemo for stage 4 colon cancer. Same location as yours. Originally mets were in peri and other places along outside of colon. Told not operable. Cea started in mid 40s now in single digits. Chemo consisted of 5 floro and another drug. Last scan showed only liver tumors but they have shrunk. Suddenly surgeon says Im now operable (although high risk of returning). Bottom line chemo has improved significantly. It’s still a chore but not like it was even a few years ago. Be heartened. The best defense to what lies ahead is a good attitude.