Helicobacter Pylori, Atrophic Gastritis and Intestinal Metaplasia Registry and Prospective Study

Since much is unknown about factors that lead to progression of the pre-neoplastic lesions and cancer. In addition, there is ongoing debate on the optimal surveillance intervals and techniques. To solve these important clinical questions, the establishment of a registry for a longitudinal study is planned.

Inclusion Criteria: * Adults \>= 18 years of age * Written informed consent obtained * Diagnosed with current or past H. pylori infection, * Histologically proven atrophic gastritis (body and/or antrum of stomach), intestinal metaplasia (complete and incomplete), dysplasia (any grade) and/or gastric cancer (post- treatment) Exclusion Criteria: * Co-morbid illness that prohibit endoscopic surveillance * Declines for study questionnaire, biobanking of specimens and/or regular review per study protocol