Colon cancer T4N0M0 indicates that the patient is currently in stage II, N0M0 indicates that the patient does not have metastasis in regional lymph nodes and distant organs, while T4 indicates that the tumor invades local organs and exceeds the plasma membrane layer or invades the surrounding tissues and organs. This is because according to the principle of TNM staging, T refers to the depth and level of local infiltration of tumor, N refers to whether there is metastasis in regional lymph nodes, and M refers to whether there is metastasis in distant organs. Patients with colon cancer T4N0M0 need to undergo surgery, and surgical treatment for resection of colon cancer has better therapeutic effect and prognosis, which is important for prolonging the life of the patients and improving the life of the patients. Patients should go to the hospital for timely consultation and examination if they have any discomfort, and once diagnosed, they should actively cooperate with doctors for treatment and avoid carelessness, so as not to delay the treatment and affect the treatment effect of patients.