What happens to the majority of stomach that is stapled away?
This portion will remain with you (see figure #1). It will continue to make gastric juice that will mix with bile and other digestive juices before emptying back into the intestine downstream. At that point it will meet with the food coming down from the small pouch. It would appear from long term studies that there is no increased risk of any problems in this cut away stomach. If some time in the future there were problems suspected in the old stomach, it may have to be investigated by an open or laparoscopic procedure (an endoscopy through the esophagus can no longer reach this portion of the stomach to view it).