The Management of Revised Group Classification(Histological Assessment of Gastric Biopsy Specimens) Takashi Yao 1 1Department of Human Pathology, Juntendo University School of Medicine, Tokyo Keyword: Group分類 , 胃癌取扱い規約 , indefinite for neoplasia , 腺腫 , 腺癌 pp.159-164
Published Date 2012/2/25
DOI https://doi.org/10.11477/mf.1403113090
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 Group classification(histological assessment of gastric biopsy specimens)has been drastically revised by the Japanese classification of gastric carcinoma(14 edition, 2010). The lesion is classified by its nature in the revised Group classification, while it was classified by degree of atypia. Therefore, the revised Group classification is easier to understand for clinicians than the previous one.

 Groups 1 and 5 have no change, but, Groups 2, 3 and 4 have been revised. Group 3 can be only used for adenoma. Group 2 is defined as indefinite for neoplasia, in which, as a result, regenerative atypia, adenoma and carcinoma can be included. Group 4 is defined as neoplastic lesion suspected of being carcinoma, in which are included adenoma with high-grade atypia and carcinoma with low-grade atypia.

 In order to avoid confusing the true nature of the lesion according to Group classification, careful description and explanation for diagnosis should be taken into consideration by the pathologist.

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