Abstract
In this article the histological features of acute and chronic gastritis are reviewed. The histopathological gastric biopsy report can now encompass an aetiological, topographical (when antrum and corpus are sampled) and morphological comment on the gastric mucosa. The degree of detail included in the report (e.g. grading of the severity of inflammation, atrophy, density of Helicobacter pylori) will vary according to local requirement. However, the distinct recognisable patterns of inflammation categorised in the Sydney system provide a common terminology for a succinct diagnosis. The overall condition of the patient's gastric mucosa assigns him/her to one of the H. pylori-positive or negative categories of chronic gastritis. This may not only have relevance to current clinical management, but may be a valuable record if the patient returns with dyspeptic symptoms in the future. For example, duodenal ulcers are unlikely to develop except in patients with antrum predominant H. pylori-associated gastritis. Knowledge of the natural history of different types of gastritis is rapidly evolving, and the biopsy provides a permanent 'snapshot' of the state of the gastric mucosa at the time of the endoscopy.
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