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Pathological Study of Esophageal Intraepithelial Tumor:What is an Esophageal Intraepithelial Tumor:A Pathologist's Perspective Tetsuo Nemoto 1 1Department of Pathology, Showa University Northern Yokohama Hospital, Yokohama, Japan Keyword: 扁平上皮内腫瘍 , SIN , 腫瘍性病変 , 上皮内癌 , 食道扁平上皮 pp.231-241
Published Date 2022/3/25
DOI https://doi.org/10.11477/mf.1403202672

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  • Abstract
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 SIN(squamous intraepithelial neoplasia)of the esophagus is defined as an intraepithelial lesion determined to be a tumor, but not a cancer. An important factor in determining that a lesion is a neoplasm is that it has territoriality. In the esophagus, the majority of territorial atypical epithelial lesions tend to be diagnosed as cancer by experienced pathologists. Factors that make pathologists hesitate in making a diagnosis of cancer include less cellular atypia and a tendency to differentiate toward the surface layer. In addition, while making the diagnosis on less informative specimen such as small biopsy material, some pathologists may pose the diagnosis of SIN for convenience. It is necessary to verify whether a pathologically low-grade tumor diagnosed as SIN reflects the clinical course of the lesion. If there is a group of tumors that do not grow horizontally and vertically for a long period of time, it is logical to establish the concept of SIN in the sense that clinical treatment is different from normal cancer. Even if it is expected that it will be difficult to observe over time, including pathological evaluation, further collaborative investigation by endoscopists and pathologists is necessary.


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

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