Prospective Registration Study of Totally Laparoscopy Versus Laparoscopy Assisted Colon Cancer Surgery

Inclusion Criteria:

1. Age: 18-80 years old, male or female;
2. Colon cancer (ascending colon, transverse colon, descending colon, sigmoid colon) is diagnosed by histology or cytology;
3. The clinical stage is T1-4aN0-2M0; 4 No multiple distant metastases;

5\. ECOG score 0-2; 6. Heart, lung, liver, and kidney functions can tolerate surgery; 7. Patients and their families can understand and are willing to participate in this clinical study, and sign an informed consent.

Exclusion Criteria:

1. Past history of malignant colorectal tumors or recent diagnosis combined with other malignant tumors;
2. Patients with intestinal obstruction, intestinal perforation, intestinal bleeding, etc. who need emergency surgery;
3. Neighboring organs need to be combined with organ resection;
4. New adjuvant therapy before surgery;
5. ASA grade ≥ grade IV and/or ECOG physical status score\> 2 points;
6. Those who have severe liver and kidney function, cardiopulmonary function, blood coagulation dysfunction, or combined with serious underlying diseases that cannot tolerate surgery;
7. History of severe mental illness;
8. Pregnant or lactating women;
9. Patients with other clinical and laboratory conditions considered by the investigator should not participate in the trial.