Description

Previously, our studies have demonstrated the presence of nerve plane in laparoscopic rectal cancer surgery, which was the overlying tiny membranous tissue including the nerves, the adipose tissue, and the extremely tiny capillaries around the nerve. As a consequence, the concept of nerve plane-oriented functional total mesorectal excision (FTME) was proposed as an optimal surgical procedure about pelvic autonomic nerve preservation in rectal cancer surgery. Following the TME principles, the surgical procedure of FTME was guided by the nerve plane and dissected between the proper fascia of the rectum and nerve plane (the first gap), which could ensure completeness of the nerve plane and the proper fascia of the rectum. This surgical procedure not only ensures radical resection but also protects PAN better, and the investigators also showed the difference between routine TME and FTME in our previous study, which included inferior mesenteric plexus preservation, station 253 nodes dissection, existence of the first gap, Waldeyer's fascia and Denonvillier's fascia (DVF) preservation, neurovascular bundles preservation, and completeness of mesorectum and nerve plane. Currently, it was a lack of higher-level evidence-based evidence to confirm the protective effect of laparoscopic FTME on urinary and sexual function in male patients with mid-low rectal cancer. In the present study, the investigators performed the prospective, single-arm, multicenter, uncontrolled clinical study, eligible patients will be performed laparoscopic FTME surgery. Postoperative sexual function, urinary function, complications, quality of life, recurrence rate, recurrence patterns, disease-free survival, and overall survival will be recorded prospectively. The results of the patients will be assessed to validate postoperative functional outcomes and oncologic outcomes of laparoscopic FTME surgery.