慢性胃炎（chronic gastritis）為上消化道內視鏡檢查下常見的現象，下列敘述何者正確？
慢性胃炎可根據其範圍分為type A: body-predominant gastritis及type B: antral-predominant gastritis
body-predominant gastritis主要導因為Helicobacter pylori infection，而antral-predominant gastritis主要導因為autoimmune related problem
autoimmune gastritis的病程會依循multifocal atrophic gastritis、gastric atrophy、metaplasia，最後可能導致gastric adenocarcinoma
antral-predominant gastritis與pernicious anemia有關連，病人血液中會有antibodies against parietal cells及intrinsic factor
