Helicobacter pylori induced gastritis

**Definition:** Gastritis with Helicobacter pylori infection. H. pylori infection causes acute gastritis at first. Lasting the infection the gastric mucosa turns into chronic gastritis and atrophic gastritis, one of the risk factors of gastric adenocarcinoma.

**Exclusions:** - Helicobacter pylori associated gastric ulcer - Helicobacter pylori associated and drug-induced gastric ulcer