This book provides extensive information on the duodenal switch and all of its derivatives. The number of procedures performed is progressively increasing, as cases of obesity are on the rise and patients’ body mass index (BMI) is getting higher. It discusses all the techniques involved in the duodenal switch procedure and its derivatives used in the primary and revision situations. Readers will learn what the procedure can offer not only in terms of weight loss, but also its potential with regard to metabolic diseases, since some data indicates that the duodenal switch may lead to rapid resolution of diabetes and other comorbidities.