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Pathological Characteristic of Small Adenomas in the Large Intestine Noriko Suzuki 1,2 , Shingo Ishiguro 1 1Department of Pathology, The Center for Adult Disease 2The Third Department of Internal Medicine, Osaka City University Medical School Keyword: 大腸微小腺腫 , mitosis , apoptosis pp.1565-1570
Published Date 1995/11/25
DOI https://doi.org/10.11477/mf.1403105587
  • Abstract
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 Recent advances in endoscopic and diagnostic techniques have enabled us to detect a large number of small lesions (less than 5 mm in their greatest diameter) in the large intestines. In order to investigate whether any specific feature closely related to the size of adenoma exists or not, we reviewed the gross and microscopic appearance, the number of mitoses, and the number of incidences of apoptosis. Most of the small adenomas were benign (Group 2 or 3), exhibiting the shape of either Is, or Isp.

 Mitotic index and apoptotic index of the small adenomas (≦5 mm) were compared with those of large adenomas (≧6 mm). When compared with large adenomas, small adenomas showed a smaller mitotic index (p = 0.0002), while they showed a larger apoptotic index (p = 0.0005). These results suggested that the balance between mitosis and apoptosis influences the the size of the adenomas. This supports our proposal that small adenomas with their significantly high apoptotic index and with their low mitotic index, will possibly become stable or decrease in size with the lapse of time.


Copyright © 1995, 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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