Comparative Study of Medial-to-Lateral Approach vs Dorsal and Medial Hybrid Approach in Laparoscopic Right 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