Sleeve Gastrectomy With Transit Bipartition(SG+TB) Versus Roux-en-Y Gastric Bypass (RYGB) for Type 3 Obesity

Inclusion Criteria: * Patient who has benefited from a pluridisciplinary evaluation, with a favorable opinion for SG+TB or RYGB as a first intention procedure with BMI ≥40 kg/m2 or BMI ≥ 35 kg/m2 associated with one co-morbidity which will be improved by surgery (according to HAS 2009 recommendation3) OR as a second intention procedure (revisional surgery) after failure of Sleeve gastrectomy (defined as insufficient weight loss at 18 months after surgery (EWL% \<50), or as weight regain (+ 20%)). * Patient who had benefited from an Upper GI Endoscopy with biopsies to look for Helicobacter Pylori (HP) and a HP eradication. * Patient who understands and accepts the need for a long-term follow-up * Patient who agrees to be included in the study and who signs the informed consent form * Patient affiliated to a healthcare insurance plan Exclusion Criteria: * History of previous bariatric surgery, other than a Sleeve Gastrectomy * Patient with current BMI \> 60 kg/m2 * Presence of a severe and evolutive life threatening pathology, unrelated to obesity * History of Chronic inflammatory bowel disease * Type 1 Diabetes * Pregnancy or desire to be pregnant during the study * Nursing woman * Presence of Pylori Helicobacter resistant to medical treatment * Presence of a non-healed gastro-duodenal ulcer or diagnosed less than 2 months previously * Severe esophagitis (grade C of Los Angeles classification) * Hiatal hernia * Patients with unstable psychiatric disorder, under supervision …