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Gastritis is the inflammation of the lining of the stomach. [1] It may occur as a short episode or may be of a long duration . [ 1 ] There may be no symptoms but, when symptoms are present, the most common is upper abdominal pain (see dyspepsia ). [ 1 ]
Atrophic gastritis under low power. H&E stain. Autoimmune metaplastic atrophic gastritis (AMAG) is an inherited form of atrophic gastritis characterized by an immune response directed toward parietal cells and intrinsic factor. [6] Achlorhydria induces G cell (gastrin-producing) hyperplasia, which leads to hypergastrinemia.
Inflammation of the stomach by infection from any cause is called gastritis, and when including other parts of the gastrointestinal tract called gastroenteritis. When gastritis persists in a chronic state, it is associated with several diseases, including atrophic gastritis, pyloric stenosis, and gastric cancer.
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Reactive gastropathy is morphologically distinct entity [3] [4] that can be separated from gastritis, which by definition has a significant inflammatory component. As a reactive gastropathy may mimic a (true) gastritis symptomatically and visually in an endoscopic examination , it may incorrectly be referred to as a gastritis.
The causes are divided into benign or malignant. Benign Peptic ulcer disease; Infections, such as tuberculosis; and infiltrative diseases, such as amyloidosis.; A rare cause of gastric outlet obstruction is blockage with a gallstone, also termed "Bouveret syndrome" or "Bouveret's syndrome".
Biliary reflux, also called bile reflux, duodenogastroesophageal reflux (DGER) or duodenogastric reflux, is a condition that occurs when bile and/or other contents like bicarbonate and pancreatic enzymes flow upward (refluxes) from the duodenum into the stomach and esophagus.
[8] [66] Where the gastritis develops into chronic gastritis, or an ulcer, the symptoms are the same and can include indigestion, stomach or abdominal pains, nausea, bloating, belching, feeling hunger in the morning, feeling full too soon, and sometimes vomiting, heartburn, bad breath, and weight loss.