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Development of Colorectal Cancer in Ulcerative Colitis, Clinicopathological Study of 347 Patients and New Concepts of Cancer Development from Analysis of Mucosal Cell Proliferation Activity Isao Okayasu 1 , Mutsunori Fukiwara 2 , Tamiko Takemura 2 , Hiroshi Toyoshima 3 , Kyoichi Nakamura 1 1Department of Pathology, School of Medicine, Tokyo Medical and Fental University 2Department of Pathology, Japanese Red Cross Medical Center 3Department of Surgery, Japanese Red Cross Medical Center Keyword: 潰瘍性大腸炎 , 大腸癌 , dysplasia , 大腸癌累積発生頻度 , 細胞増殖動態 pp.171-179
Published Date 1993/2/25
DOI https://doi.org/10.11477/mf.1403106050

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  • Abstract
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 By clinicopathological analysis of 347 patients (male 178, female 169) of ulcerative colitis (UC) on which follow-up study has been performed at three hospital in Tokyo metropolitan area, cumulative probabilities of developing colorectal cancer were estimated as follows: 10 year period, 1.1%; 15 year period, 3.2%; 20 year period, 11.1%. Histopathological study of 32 surgically resected specimens of the colon and 23 remaining recturns after colectomy showed a high incidence of dysplasia (12.5%, 8.7% respectively). These results suggest that carcinoma and dysplasia may arise in Japanese UC patients with long suffering periods. UC patients with neoplasms were significantly younger (46.8 years of age) and more female dominant than those with sporadic colorectal cancers.

 Histopathological findings of mitosis index, AgNORs granules and PCNA positive cells revealed that mitosis and cellular proliferation of mucosal epithelium obtained from active UC patients were more prominent than those from UC in remission phase or non-UC patients. In conclusion, the repetition of necrosis and regeneration may cause the pre-malignant change and the increase in incidence of colorectal cancer.


Copyright © 1993, 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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