Gastritis is inflammation of the gastric mucosa and can be classified by time course (acute or chronic), histologic features, and etiology. The predominant causes are Helicobacter pylori infection and aspirin/NSAID use. Chronic (metaplastic) gastritis may be due to autoimmune or environmental causes and is a risk factor for gastric cancer. Individuals with gastritis may be asymptomatic or may have abdominal pain, dyspepsia, and nausea. Treatment of acute and chronic gastritis due to H. pylori infection involves acid suppression and antibiotics. Other causes are managed by avoiding offending agents and replacing associated deficiencies.
Last updated: Feb 16, 2023
Gastritis is the inflammation Inflammation Inflammation is a complex set of responses to infection and injury involving leukocytes as the principal cellular mediators in the body’s defense against pathogenic organisms. Inflammation is also seen as a response to tissue injury in the process of wound healing. The 5 cardinal signs of inflammation are pain, heat, redness, swelling, and loss of function. Inflammation of gastric mucosa Gastric mucosa Lining of the stomach, consisting of an inner epithelium, a middle lamina propria, and an outer muscularis mucosae. The surface cells produce mucus that protects the stomach from attack by digestive acid and enzymes. When the epithelium invaginates into the lamina propria at various region of the stomach (cardia; gastric fundus; and pylorus), different tubular gastric glands are formed. These glands consist of cells that secrete mucus, enzymes, hydrochloric acid, or hormones. Stomach: Anatomy associated with mucosal injury.
Gastritis is usually due to an infection or an immune-mediated process.
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