Surgery Treatment of Type 2 Diabetes Mellitus Patients With Grade 1 Obesity and Overweight

Inclusion Criteria: * Documented diagnosis of type 2 diabetes mellitus; * Patients of both sexes treated with oral antidiabetic agents and / or insulins, * Stable antidiabetic medication in the last 8 weeks prior to selection, if the therapy includes insulin, the mean daily dose should not have been changed by more than 10% in the last 8 weeks; * HbA1c\> 7.0%; * Age\> 20 years and \<65 years; * Body mass index (BMI) of 25 to 35 kg / m²; * Agree to sign the consent form; Exclusion Criteria: * Diabetes mellitus type 1 (anti-glutamic acid decarboxylase(GAD) positive) or anti-GAD negative body with low β-cell function (peptide C after stimulation \<0.5 ng / ml); * Recent vascular event (myocardial infarction, coronary angioplasty or encephalic vascular accident in the last 6 months); * Malignant neoplasm; * Portal hypertension; * Difficulty to cooperate with segment; * Low ability to understand surgery; * Unrealistic expectations of results; * Cognitive deficit; * Current pregnancy; * Moderate or severe mood disorder; severe anxiety; eating disorders (based on Substance-Related Disorders DSM-V criteria); * Chemical dependence or alcoholism (based on Substance-Related Disorders DSM-V criteria).