Endoscopic criterias
1. erythematous/exudative gastritis
2. gastritis with flat erosions
3. gastritis with polypoid erosions
4. atrophic gastritis
5. haemorrhagic gastritis
6. reflux gastritis
7. large fold gastritis
Staging according to localisation
1. Pangastritis
2. Corpusgastritis
3. Antrumgastritis
Grading
normal, slight-, moderate-, severe
Etiopathogenetic Grading
1. Autoimmune gastritis (Type A)
2. Pathogen-induced gastritis (Type B)
3. Chemical-toxic ind. gastritis (Type C)
4. Specail types of gastritis
Histomorphological Criterias
1. acute
2. chronic
3. chronic-aktive