To investigate the feasibility and safety of posterior approach "fan deployment" combined with intermediate leaf turning lymph node dissection in laparoscopic complete mesocolic excision(CME), and to provide theoretical basis and practical reference for clinical practice.

In our research, 47 patients with right colon cancer from Tong Liao City Hospital (2019.09-2020.10) were studied by description. According to different surgical methods, they were divided into two groups. One group was laparoscopic posterior approach "fan-shaped deployment" combined with middle flip lymph node dissection (posterior approach group) (23 cases), and the other group was laparoscopic right hemicolectomy with vascular priority (middle approach group) (24 cases). The operation time, intraoperative blood loss and complications were observed.

There was no difference in preoperative data between the two groups (P> 0.05). The average operation time, average intraoperative blood loss and postoperative eating time in the posterior approach group were significantly better than those in the middle approach group (P< 0.05). Anal exhaust time, average postoperative hospital stay, puncture site complications, no intestinal leakage and abdominal infection, the total number of lymph nodes were cleaned, and there was no significant difference between the positive lymph nodes and the intermediate approach group (P> 0.05).

The "fan-shaped deployment" combined with middle leaf turning lymph node dissection through the posterior approach in laparoscopic CME can simply and clearly enter the correct anatomical plane and carry out complete membrane dissection. In the whole process, it can avoid the occurrence of intraoperative complications, improve the operation quality, reduce the operation difficulty, reduce the overall time of operation and shorten the training time of doctors, a surgical approach that is more easily operated by doctors.