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Japanese

Colonic Cancer in Adenoma with Peculiar Shape and Pseudocarcinomatous Invasion, Report of a Case Toshihiko Kobayashi 1 , Taizo Kimura 1 , Masayuki Yoshida 1 , Shunji Sakuramachi 1 , Osamu Kubota 1 1The First Department of Surgery, Hamamatsu University School of Medicine Keyword: pseudocarcinomatous invasion , 偽浸潤 , pseudoinvasion , 大腸腺腫 , 大腸粘液癌 , 腹腔鏡下結腸切除術 pp.919-923
Published Date 1996/6/25
DOI https://doi.org/10.11477/mf.1403104182
  • Abstract
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 A 58-year-old man was admitted to our hospital for surgical treatment of a colonic polyp. The polyp was located in the descending colon, about 2 cm in diameter, and pedunculated. Endoscopic examination demonstrated that the stalk of the twisting polyp was too thick to be operated on by polypectomy. Because the polyp was relatively large and nodularly changed in its head, it was suggested that the lesion might be accompanied by malignancies. Partial colectomy was performed assisted by laparoscopy. The lesion was 20 × 18 × 30 (height) mm in size, which, macroscopically, consisted of a nodular part in the top and a smooth part like a submucosal tumor at the base. In the cut surface, the part like a submucosal tumor was filled with mutinous pooling. Microscopically, the lesion of the head was mostly diagnosed as tubular adenoma with moderate atypic, partly accompanied with intramucosal cancer showing positive, immunohistochemically, for anti-p53 antibody. The lesion in the base of the polyp contained much mucin and adenomatous tissues among the proliferating muscularis mucosae. The atypic of the adenomatous lesion was relatively close to the head, and bleeding was detected in the peripheral tissues. So, this polyp was finally thought to be a colonic cancer in an adenoma with pseudocarcinomatous invasion, histopathologically.


Copyright © 1996, 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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