Chronic atrophic gastritis is generally classified using the Kyoto Gastritis Classification of Japan and the Gastrointestinal Endoscopy Branch of the Chinese Medical Association.
1. Kyoto gastritis classification: endoscopic atrophic gastritis is graded by Kimura-Takemoto classification, endoscopic atrophic boundaries do not cross the cardia for closed type (type C), and cross the cardia for open type (type O).
(1) Type C: C1 mucosal atrophy is mainly in the antrum or gastric angle, C2 mucosal atrophy is in the lower curvature of the gastric body, and C3 mucosal atrophy is in the upper curvature of the gastric body.
(2) Type O: divided into O-1 (atrophic boundary just past the cardia), O-2 (atrophic boundary throughout the gastric fundus), O-3 (atrophic boundary extending to the gastric body).
2. Classification of the Gastrointestinal Endoscopy Branch of the Chinese Medical Association: according to the symptoms of atrophic gastritis, the mucosa is granular, the folds are flattened, the blood vessels are visible, and there may be gray intestinal epithelial hyperplasia nodules, which are divided into 3 levels.
(1) Granular type:Diffuse granular changes on the mucosal surface of the gastric antrum.
(2) Gray-white type: the lesion area shows a large area of gray-white-like changes.
(3) Shallow depression type:The mucosal layer at the lesion is thin and relatively whitish, and the surrounding mucosa is reddish, clearly demarcated from the normal tissue, with small blood vessels visible in the center.
The presence of atrophic gastritis requires prompt medical attention and regular review of gastroscopy.