['Traditional laparoscopic surgery presents some difficulties for morbidly obese patients due to limited motion of instruments related to a thick abdominal wall, intraabdominal fat, and a large hepatic left lobe, with consequent loss of dexterity and greater musculoskeletal discomfort. Robotic technique could potentially overcome these limitations. This study aimed to evaluate robot-assisted laparoscopic Roux-en-Y gastric bypass in morbidly obese patients and to compare the results of robotic assistance with those of traditional laparoscopic technique.', 'Between September 2006 and June 2009, 110 morbidly obese patients underwent laparoscopic Roux-en-Y gastric bypass with robot-assisted hand-sewn gastrojejunal anastomosis using the da Vinci Surgical System. The data for these patients was compared with the data for 423 consecutive patients treated in a standard laparoscopic manner during the same period.', 'The patients had a mean preoperative age of 42.6 years, a mean weight of 127.5 kg, and a mean body mass index (BMI) of 46.7 kg/m2. The total mean operative time was 247.5 min. The robotic setup time was 10.1 min, and the robotic operative time was 54.5 min. The conversion rate was nil. The intraoperative complication rate was 4.5%. The early and late major postoperative complication rates were 3.6 and 6.4% respectively. The cost per patient was 5777.76 €. For the standard laparoscopy, the operative time was significantly shorter (187 min; p<0.001), and the costs per patient were significantly lower (4658.28 €; p<0.001), whereas no differences were found in terms of the intra- or postoperative complication rates, revisional surgery, or hospital length of stay.'] Does robot-assisted gastrojejunal anastomosis improve the results of the laparoscopic Roux-en-Y gastric bypass?