After surgery and possible chemotherapy after surgery, you will be seen by a doctor every 3-4 months for 1 year, and then every 6 months for the next 3 years. You will have blood tests at these doctor visits. You will also have CT scans within 4-6 months after completion of chemotherapy then every 6 months for the first 3 years, and then once a year for the next 2 years. These tests are all the standard of care procedures for treatment of colorectal cancer.