Peritonitis may be localized or generalized, and may result from infection (often due to rupture of a hollow organ as may occur in abdominal trauma or appendicitis) or from a non-infectious process.
Examples include perforation of the distal esophagus, of the stomach by a peptic ulcer or gastric carcinoma, of the duodenum, of the remaining intestine by appendicitis, diverticulitis, inflammatory bowel disease (IBD), intestinal infarction, intestinal strangulation, colorectal carcinoma, or of the gallbladder.
If properly treated, typical cases of surgically correctable peritonitis (e.g., perforated peptic ulcer, appendicitis, and diverticulitis) have a mortality rate of <10% in otherwise healthy patients, which rises to about 40% in the elderly, and/or in those with significant underlying illness, as well as in cases that present late (after 48 hours).
Changes that may appear in the small intestine include: appendicitis duodenal ulcers malabsoration of nutrients due to a variety of causes, including inflammatory bowel diseases, radiation enteritis, digestive failure, and malnutrition. maldigestion.