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Gastritis refers to the histologic presence of mucosal inflammation in the gastric tract. It encompasses a number of different entities, including Helicobacter pylori–related gastritis, erosive gastropathy secondary to substance use or biliary reflux, stress-related gastritis, autoimmune gastritis, and phlegmonous gastritis.
Gastritis is differentiated from gastropathy, which is a term that refers to gastric mucosal damage with minimal to no active inflammation. Gastritis is primarily driven by active mucosal inflammation. The distinction may require histologic examination.
