Patients and methods: OLGA staging of atrophic gastritis (from 0 to IV) and accessement of histopathological lesions of GM according to the Update Sydney system, including CG, active gastritis, Helicobacter pylori (HP) status, intestinal metaplasia (IM) and dysplasia were applied in 300 CG outpatients who underwent an uper gastrointesstinal endoscopy with standardised biopsy sampling according to the recomodation of OLGA system.