Duodenal ulcer
Definition The duodenal ulcer (Ulcus duodeni) is an inflammatory wound of the intestinal mucosa in the area of the duodenum. The duodenum is the first section of the small intestine following the stomach. The ulcer, i.e. the wound, extends beyond the muscle layer of the mucous membrane of the small intestine (lamina muscularis mucosae). Dangerous … Duodenal ulcer