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Histopathological Findings and p53 Genetic Abnormality in Esophageal Squamous Intraepithelial Neoplasias Hiroshi Kawachi 1 , Maki Kobayashi 2 , Toichiro Takizawa 3 , Jiro Kumagai 2 , Tetsuo Nemoto 4 , Nobuaki Funata 4 , Kumiko Momma 5 , Kenro Kawada 6 , Tatsuyuki Kawano 6 , Yoshinobu Eishi 2 , Morio Koike 7 1Department of Pathology, Tokyo Medical and Dental University Hospital, Tokyo 2Department of Human Pathology, Tokyo Medical and Dental University Hospital, Tokyo 3Department of Molecular Pathophysiology, Tokyo Medical and Dental University Hospital, Tokyo 4Department of Pathology, Tokyo Metropolitan Komagome Hospital, Tokyo 5Department of Endoscopy, Tokyo Metropolitan Komagome Hospital, Tokyo 6Department of Esohago-gastric Surgery, Tokyo Medical and Dental University Hospital, Tokyo 7Department of Health and Medical Technology, Bunkyo Gakuin University, Tokyo Keyword: 食道上皮内癌 , 食道異形成 , p53免疫染色 , p53点突然変異 , 病理診断 pp.173-186
Published Date 2007/2/25
DOI https://doi.org/10.11477/mf.1403100948

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 The aim of this study is to clarify the difference between esophageal squamous cell carcinoma in situ (CIS) and dyplasia (DYS) diagnosed histopathologically. We analyzed 21 lesions of CIS and 21 lesions of DYS by morphometry, p53 immunohistochemistry, and p53 point mutation analysis. In morphometrical analysis, there are significant differences in nuclear size and nuclear shape between CIS and DYS. However, there are no significant differences in the percentages of p53 protein overexpression and p53 point mutation between CIS and DYS (86% v.s. 81%, 71% v.s. 67%, respectively). Thus, point mutation of p53 gene is considered to be an alteration of the early phase of carcinogenesis. From our results, it is possible that DYS is carcinoma in situ with low-grade atypia. However, it is a fact that there are some cases in long-time follow up of DYS that show neither enlargement nor invasion. As it is possible to decide how to treat DYS by endoscopical findings such as size, shape, and color, we can use "dysplasia" as the diagnositic term to mean the lesions that should be followed endoscopically.


Copyright © 2007, Igaku-Shoin Ltd. All rights reserved.

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

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