Short- and long-term results of open laparoscopic multisegmental resection and anastomosis for synchronous colorectal cancer located in separate segments.

Background: It remains unclear whether laparoscopic multisegmental resection and anastomosis (LMRA) is safe and advantageous over traditional open multisegmental resection and anastomosis (OMRA) for treating synchronous colorectal cancer (SCRC) located in separate segments.

Aim: To compare the short-term efficacy and long-term prognosis of OMRA as well as LMRA for SCRC located in separate segments.

Methods: Patients with SCRC who underwent surgery between January 2010 and December 2021 at the Cancer Hospital, Chinese Academy of Medical Sciences and the Peking University First Hospital were retrospectively recruited. In accordance with the inclusion and exclusion criteria, 109 patients who received right hemicolectomy together with anterior resection of the rectum or right hemicolectomy and sigmoid colectomy were finally included in the study. Patients were divided into the LMRA and OMRA groups ( = 68 and 41, respectively) according to the surgical method used. The groups were compared regarding the surgical procedure's short-term efficacy and its effect on long-term patient survival.

Results: LMRA patients showed markedly less intraoperative blood loss than OMRA patients (100 200 mL, = 0.006). Compared to OMRA patients, LMRA patients exhibited markedly shorter postoperative first exhaust time (2 3 d, = 0.001), postoperative first fluid intake time (3 4 d, = 0.012), and postoperative hospital stay (9 12 d, = 0.002). The incidence of total postoperative complications (Clavien-Dindo grade: ≥ II) was 2.9% and 17.1% ( = 0.025) in the LMRA and OMRA groups, respectively, while the incidence of anastomotic leakage was 2.9% and 7.3% ( = 0.558) in the LMRA and OMRA groups, respectively. Furthermore, the LMRA group had a higher mean number of lymph nodes dissected than the OMRA group (45.2 37.3, = 0.020). The 5-year overall survival (OS) and disease-free survival (DFS) rates in OMRA patients were 82.9% and 78.3%, respectively, while these rates in LMRA patients were 78.2% and 72.8%, respectively. Multivariate prognostic analysis revealed that N stage [OS: HR hazard ratio (HR) = 10.161, = 0.026; DFS: HR = 13.017, = 0.013], but not the surgical method (LMRA/OMRA) (OS: HR = 0.834, = 0.749; DFS: HR = 0.812, = 0.712), was the independent influencing factor in the OS and DFS of patients with SCRC.

Conclusion: LMRA is safe and feasible for patients with SCRC located in separate segments. Compared to OMRA, the LMRA approach has more advantages related to short-term efficacy.