Histological CascadeGastric Precancerous StagingPatient Education GuideBiopsy Finding Hierarchy1Normal Mucosa2Non-atrophic Gastritis3Atrophic Gastritis4Intestinal Metaplasia5Low-Grade Dysplasia6High-Grade Dysplasia7AdenocarcinomaClassify Risk tierRisk EngineSelect the histological findings to determine the risk of progression to gastric adenocarcinoma.