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Gastric Ulcers | © Cynthia Turner
Gastric or peptic ulcers are mucosal erosions of the gastrointestinal tract lining, often caused by the presence of Helicobacter pylori, a bacterium that lives in the acid environment of the stomach. Most ulcers arise in the duodenum (first part of the small intestine) rather than the stomach. For Merck Pharmaceutical Co.
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