Surveillance of Patients With Precancerous Lesions of the Stomach

Upper endoscopy with proper biopsy work-up will be used for identification and stratification of gastric lesions as well as acquisition of biopsies for histopathological examination, including H.pylori detection

Plasma/serum sampling will be used to obtain information for group stratification, e.g. H.pylori status determination, serum biomarkers

During upper endoscopy biopsies for gastric microbiota analysis will be obtained

Faecal samples will be obtained for faecal occult blood testing as well as microbiota analysis