ETIOLOGICAL CLASSIFICATION OF GASTRITIS：A REPORT FROM THE KYOTO GLOBAL CONSENSUS CONFERENCE ON HELICOBACTER PYLORI GASTRITIS

Abstract

Classification systems of gastritis that are currently utilized internationally are the Updated Sydney System and the International Statistical Classification of Diseases and Related Conditions （ICD-10）. The former system is mostly used for research purposes whereas the latter system is used for health statistics. However, both classification systems are unsatisfactory due to the ambiguous principle of classification. Furthermore, a number of categories are unlisted. To develop an internationally acknowledged etiological classification system for gastritis, which is critical for providing effective management and prevention, a consensus document was published as a result of the Kyoto Global Consensus Conference. This etiology-based classification system, achieved through international consensus, should be considered as a springboard for building a more detailed and organized classification system, as a number of issues still remain. To achieve this goal, further progress in basic gastric biology such as histogenesis, gastric microbiome, and epithelial immune mechanisms linking the pathophysiological basis of gastritis is required.