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Histopathological Finding of Autoimmune Gastritis Ryoji Kushima 1 , Tohru Kotera 2 , Shuichi Terao 3 1Department of Pathology, Shiga University of Medical Science, Otsu, Japan 2Department of Medical Examination, Uji-Tokushukai Medical Center, Uji, Japan 3Department of Gastroenterology, Kakogawa Central City Hospital, Kakogawa, Japan Keyword: 自己免疫性胃炎 , 組織学的時相分類 , 胃生検 , 幽門腺化生 , Helicobacter pylori pp.23-33
Published Date 2024/1/25
DOI https://doi.org/10.11477/mf.1403203445
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 AIG(autoimmune gastritis)diagnoses are rapidly increasing. AIG, also known as autoimmune metaplastic atrophic gastritis, starts as an immune response against the proton pump and intrinsic factor in gastric parietal cells, causing damage to fundic gland cells by the complex autoantibody and autoreactive T cell interaction. Epithelial tumors may occur during AIG. Autoimmune reaction-associated atrophy progresses over time ; thus histopathological chronological classifications have been proposed. Fundic glands are replaced by(pseudo)pyloric glands owing to parietal cell degeneration and lymphocytic infiltration ; enterochromaffin-like-cell hyperplasia and foveolar hyperplasia occur. Complete-type intestinal metaplasia appears, deep glands become sparser, and eventually, lymphocytic infiltration becomes scarce as atrophy progresses. Helicobacter pylori infection has attracted much attention in AIG pathogenesis. Inflammation and atrophy heterogeneously occur within the fundic gland mucosa ; thus coordinating endoscopically surface diagnosis with histopathological point diagnosis is crucial.


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電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院

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