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A gastrojejunostomy is a surgical procedure that directly connects the stomach to the jejunum, the second section of the small intestine, by a small tube. The tube allows food, liquids, and medications to bypass the duodenum, the first section of the small intestine.
Gastrectomy is the removal of part or all of the stomach. There are three main types of gastrectomy: 1  partial gastrectomy, removal of the lower half of the stomach.astrectomy is the removal of part or all of the stomach. There are three main types of gastrectomy: 1  partial gastrectomy, removal of the lower half of the stomach.