The 5-year survival rate of stage 3 colon cancer is about 50%, that is, about half of the patients can live for 5 years or more, and the exact length of life varies from person to person. Because stage 3 colon cancer requires chemotherapy after surgery, and during or after chemotherapy, patients need to follow up regularly at the hospital and have regular checkups. If there is no sign of tumor recurrence or metastasis during the follow-up period, it is better to follow up for at least 5 years. If tumor recurrence or metastasis occurs during the follow-up period, early intervention, such as recurrence in the anastomosis but not elsewhere, can be considered for reoperation. If liver metastases are present, surgical resection is possible to remove the metastases from the liver as much as possible. If surgical resection is not possible, microwave ablation or radiofrequency ablation can also be done.