Editing Gastrectomy (section)

==Indications==
{{More citations needed|section|date=October 2024}}
[[File:Infiltrative (poorly cohesive) gastric cancer.jpg|thumb|A [[gross anatomy]] specimen of a total gastrectomy, [[splenectomy]] for infiltrative [[gastric cancer]]]]
[[File:Infiltrative gastric cancer showing thickened stomach wall.jpg|thumb|The same picture, close-up, total gastrectomy, infiltrative gastric cancer]]
[[Image:Benign gastric ulcer 1.jpg|thumb|upright=1.2|A benign [[gastric ulcer]] (from the antrum) of a gastrectomy specimen.]]
Gastrectomies are performed to treat [[stomach cancer]] and [[Gastrointestinal perforation|perforations]] of the stomach wall.

For severe [[duodenal ulcer]]s, it may be necessary to remove the [[pylorus|lower portion of the stomach]] and the [[duodenum|upper portion of the small intestine]]. If there is a sufficient portion of the upper duodenum remaining, a [[Billroth I procedure]] is performed, where the remaining portion of the stomach is reattached to the duodenum before the [[common bile duct]]. If the stomach cannot be reattached to the duodenum, a [[Billroth II]] is performed, wherein the remaining portion of the duodenum is sealed off, a hole is cut into the next section of the small intestine (called the [[jejunum]]), and the stomach is reattached at this hole. As the pylorus is used to grind food and slowly release the food into the small intestine, removal of the pylorus can cause food to move into the small intestine faster than normal, leading to [[gastric dumping syndrome]].