Background: Laparoscopic surgery with natural orifice specimen extraction (La-NOSE) is being performed more frequently for the minimally invasive management of sigmoid and rectal cancer. The objective of this meta-analysis was to compare the clinical and oncological safety and efficacy of La-NOSE versus conventional laparoscopy (CL).
Methods: A search of the PubMed, Web of Science, and Cochrane databases was performed for studies that compared clinical or oncological outcomes of conventional laparoscopic resection using NOSE with conventional laparoscopic resection for sigmoid and rectal cancer.
Results: Compared with CL group, the length of hospital stay and the pain score on the first day were shorter in the La-Nose group. The La-NOSE group had a lower incidence of total perioperative complications (OR 0.46; 95% CI [0.32 to 0.66]; I = 0%; P < 0.0001) and a lower incidence of surgical site infections (SSIs) (OR 0.11; 95% CI [0.04 to 0.29]; I = 0%; P < 0.0001) than the CL group, while the anastomotic leakage showed no significant difference between the La-Nose group and the CL group (P = 0.19). 5-year disease-free survival (DFS) and 5-year overall survival (OS) were no significant difference between the La-Nose group and the CL group (P = 0.43, P = 0.40, respectively).
Conclusions: La-NOSE can achieve oncological and surgical safety comparable to that of CL for patients with sigmoid and rectal cancer. La-NOSE in patients was associated with a shorter hospital stay, shorter time to first flatus or defecation, less postoperative pain, and fewer surgical site infections (SSIs) and total perioperative complications. In general, the operative time in La-NOSE was longer than that in CL. The long-term oncological efficacy of La-NOSE seems to be equivalent to that of CL.
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