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Pathology - Peptic duodenitis
Definition • Inflammation and ulceration of the duodenal mucosa resulting from excessive stomach acid.

Epidemiology • Prevalent, impacting up to 10% of the populace. • Predominantly observed in male patients over 40 years of age. The primary aetiological component is believed to be chronic H. pylori infection. • Tobacco use and nonsteroidal anti-inflammatory drugs (NSAIDs) are significant risk factors. Recurrent numerous duodenal ulcers, especially if located beyond the initial segment of the duodenum, should prompt consideration of potential Zollinger–Ellison syndrome.

Pathogenesis Increased stomach acid production results in damage to the duodenal mucosa, ranging from moderate erosions to severe ulceration.
Presentation: • Epigastric pain characterized by a burning sensation, alleviated by food intake. • Severe instances result in enduring epigastric discomfort, nausea, and emesis.

Macroscopy • Peptic duodenitis exhibits mucosal erythema with possible superficial erosions. • Peptic ulcers present as well-defined, punched-out mucosal defects featuring granulation tissue at the base.

Histopathology: Peptic duodenitis exhibits acute inflammation, edema, and hemorrhage in the lamina propria. The surface epithelium generally exhibits regions of gastric metaplasia. H. pylori organisms may be detected on the metaplastic gastric epithelium. Peptic ulcers exhibit a total loss of the mucosal layer, which is replaced by granulation tissue and underlying scar tissue.
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Prognosis: The elimination of H. pylori and the administration of acid suppressive medication enhance symptoms and promote healing. Scarring of ulcers may result in stricture development and blockage. A perforation of a major vessel due to a peptic ulcer is a prevalent cause of sudden upper gastrointestinal hemorrhage. Free perforation results in acute widespread peritonitis, requiring immediate surgical intervention.


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