What is acute gastritis?

Updated: Jul 12, 2020
  • Author: Sarah El-Nakeep, MD; Chief Editor: BS Anand, MD  more...
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Answer

Acute gastritis is a term that encompasses a broad spectrum of entities that induce inflammatory changes in the gastric mucosa. Several different etiologies share the same general clinical presentation; however, they differ in their unique histologic characteristics. The inflammation may involve the entire stomach (eg, pangastritis) or a region of the stomach (eg, antral gastritis).

Acute gastritis can be divided into two categories: erosive (eg, superficial erosions, deep erosions, hemorrhagic erosions) and nonerosive (generally caused by Helicobacter pylori). See the images below.

Acute gastritis. Acute gastritis with superficial Acute gastritis. Acute gastritis with superficial erosions.
Acute gastritis. Mucosal erythema and edema consis Acute gastritis. Mucosal erythema and edema consistent with acute gastritis.

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