The Influences of Obesity in Laparoscopic and Open Distal Gastrectomy for Patients with Early Gastric Cancer

Background: A recent increase in the number of surgeries performed on obese patents has raised sev-eral issues. In this study, we examined the effects of obesity on laparoscopic and open distal gastrec-tomy.Methods: A total of 262 patients with gastric cancer (cStage I) who underwent distal gastrectomy were classified into open distal gastrectomy (ODG) (145 patients) and laparoscopic distal gastrectomy (LDG) (117 patients) groups. According to their body mass index (BMI), they were subdivided into obese (BMI >= 25) and non-obese patients (BMI < 25) to examine the duration of surgery, blood loss, the number of lymph node dissections, postoperative hospital stay, and incidence of postoperative complications.Results: The duration of surgery was longer and blood loss was higher for obese patients than for non -obese patients in both groups. The results for these two endpoints were significantly reduced in the LDG group than in the ODG group both in obese and non-obese patients. Furthermore, the number of lymph nodes dissected tended to be higher in the LDG group than in the ODG group in obese patients. Postoperative hospital stay was not significantly different between obese and non-obese patients in both groups, but was significantly shorter in the LDG group than in the ODG group regardless of the body weight. The incidence of postoperative complications was significantly higher in obese patients than in non-obese patients, although the difference between the groups was not significant.Conclusions: These findings indicate that LDG may be useful for obese patients with cStage I gastric cancer. (J Nippon Med Sch 2022; 89: 215?221)