Duodenal diverted sleeve gastrectomy with ileal interposition does not cause biliary salt malabsorption. Laparoscopic ileal interposition with diverted sleeve gastrectomy for treatment of type 2 diabetes. Impaired B absorption can also occur following gastric removal (gastrectomy) or gastric bypass surgery. It is different from the classic duodenal switch, the gastric bypass (RNY) or sleeve gastrectomy. A splenectomy or partial gastrectomy may also be required. Sleeve gastrectomy is the most commonly performed bariatric surgery worldwide. But his most famous accomplishment is unquestionably the first successful gastrectomy for gastric cancer. Ileal interposition with sleeve gastrectomy for treatment of type 2 diabetes mellitus. A gastrectomy is a partial or total surgical removal of the stomach. Ileal Interposition with diverted sleeve gastrectomy for treatment of Type 2 diabetes. The surgical procedure is called a partial gastrectomy and gastrojejunostomy. First appeared in 1980, biliopancreatic diversion involves two parts&colon; gastrectomy and intestinal bypass. Thus, "gastrectomy" refers to the surgical removal of the stomach (or sections thereof). When all other measures have failed, surgical gastrectomy is required to evacuate the bezoar. A partial gastrectomy may be necessary if there is any necrosis of the stomach wall.