Stage III colon cancer with only lymphatic metastasis means that colon cancer is in the middle or late stage of the disease and the cancer cells have already spread to the lymph. Stage III colon cancer means that the patient’s cancer is in the middle or late stage, and the cancer cells do not only exist in the intestinal wall, but also invade into the lymphatic vessels, and reach the local lymph nodes with the lymphatic fluid, forming lymph node metastasis of colon cancer. Therefore, after lymphatic metastasis occurs in stage III colon cancer, patients are recommended to cooperate with treatment in time. Surgery for colon cancer can be performed as long as the condition permits, and at the same time, the peripheral lymph nodes should be cleared, and after the surgery, postoperative adjuvant chemotherapy should be performed. When lymphatic metastasis occurs in patients with stage III colon cancer, it is recommended to go to the hospital for examination and treatment in time. Under the doctor’s evaluation, choose the suitable treatment plan for yourself.