Related Experiment Video
Updated: May 18, 2026
Laparoscopic Radical Gastrectomy for Remnant Gastric Cancer
Published on: October 31, 2025
Omentum-preserving gastrectomy for advanced gastric cancer: a propensity-matched retrospective cohort study
Shinichi Hasegawa1, Chikara Kunisaki, Hidetaka Ono
1Department of Surgery, Yokohama City University Medical Center, Urafune-cho 4-57, Minami-ku, Yokohama, 232-0024, Japan. hsgws@yokohama-cu.ac.jp
Background And Objectives:
We clarified the impact of omentectomy for advanced gastric cancer on patient survival from the surgical results of a high-volume center in Japan.
Methods:
Patients who received curative gastrectomy were divided into two groups based on whether they underwent omentectomy. The propensity score-matching method was used to assemble a well-balanced cohort, and relapse-free survival and the pattern of recurrence were compared.
Results:
For this study, 330 patients who fulfilled the inclusion criteria participated and were divided into two groups: group R, patients who received omentectomy, and group P, patients who received omentum-preserving gastrectomy. After performing score-matching, 196 patients were selected. The 3- and 5-year relapse-free survival rates were 72.9% (95% confidence interval, 64.1-81.7) and 66.2% (56.6-75.8%) in group R, and 76.7% (67.9-81.2) and 67.3% (55.1-79.5) in group P, which were not significantly different (P = 0.750). Regarding sites of relapses, no differences were observed between the groups (P = 0.863).
Conclusions:
In this series, omentum-preserving gastrectomy for advanced gastric cancer did not increase the peritoneal relapse rate or affect patient survival compared to conventional gastrectomy. The non-inferiority of the omission of omentectomy should be evaluated by a randomized controlled trial.
