The impact of obesity on the surgical outcomes of Asian patients undergoing laparoscopic colon surgery is not clear. The purpose was to evaluate the outcome of laparoscopic surgery in obese Asian patients with colon cancer. Methods: We retrospectively reviewed the prospectively collected data of 1,740 consecutive patients who underwent laparoscopic surgery for colon cancer between January 2008 and December 2010. Patients were classified according to the categories proposed by the International Obesity Task Force, Non-obese (body mass index [BMI]<25.0 kg/m 2), Obese-I (BMI, 25.0-29.9 kg/m 2), and Obese-II (BMI≥30 kg/m 2). Surgical outcomes, including open conversion, operative time, and postoperative hospital stay, were compared in the Non-obese, Obese-I, and Obese-II patients. Results: Of the 1,192 patients in the study, 812 (68.1%), 360 (30.2%), and 20 (1.7%), were classified as Non-obese, Obese-I, and Obese-II, respectively. The Obese-II group had higher conversion rates (10.0% vs. 3.6% and 1.6%, P=0.008) and, longer operative times (180.35 vs. 162.54 and 147.84 minutes, P<0.001) than the Obese-I and Non-obese group. However, the other postoperative outcomes were not significantly different. The overall survival and disease-free survival were not significantly different between groups (P=0.952). Multivariate analysis showed that the independent risk factor for conversion were BMI, total operative time, previous operative history, and cancer perforation. Conclusion: The outcomes of laparoscopic colon surgery in obese patients are similar to those of non-obese patients, offering all the benefits of a minimally invasive approach. However, the conversion rate was higher in obese patients. It is therefore very important for surgeons to be aware of these risks during laparoscopic colon surgery in obese patients.
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