To standardize the surgery for advanced right hemi colon cancer with laparoscopy and investigate whether dorsal and medial hybrid approach could improve disease-free survival in patients with right colon cancer, compared with traditional medial-to-lateral approach in laparoscopic righ hemicolectomy.

Inclusion Criteria:

• Aged more then 18 years old;
• Diagnosed as right hemi colonic cancer with colonoscopic biopsy;
• Without metastasis;
• No Invasion of surrounding tissues;
• Limited operation;
• Underwent laparoscopic radical right hemicolectomy (L-right hemicolectomy);
• BMI 18~30kg/m2;
• Without multiple primary tumors;
• Sign on the Medical informed Consent.

Exclusion Criteria:

• Simultaneous or simultaneous multiple primary colorectal cancer;

• Preoperative imaging examination results show:

  1. Tumor involves the surrounding organs and combined organ resection need to be done;
  2. Distant metastasis;
  3. Unable to perform R0 resection;

• History of any other malignant tumor in recent 5 years;

• Patients need emergency operation;

• Not suitable for laparoscopic surgery;

• Women during Pregnancy or breast feeding period;

• Informed consent refusal