Clinical Differentiation of Inflammatory Polyp and Adenomatous Polyp T. Kanazawa 1 , S. Kashihara 1 , S. Kuramoto 1 , K. Kunishima 2 , T. Soma 3 1Dept. of Abdominal Surgery, Tenri Hospital pp.655-660
Published Date 1974/5/25
DOI https://doi.org/10.11477/mf.1403111874
  • Abstract
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 Polypoid lesions detected by colonoscopy at Tenri Hospital during the period from January 1970 to June 1973 included 23 cases of inflammatory polyps seen in 31 cases of ulcerative colitis,14 of adenomatous polyps and 3 of polypoid early cancer. In polypoid lesions of ulcerative colitis, three types were recognized, the so-called pseudopolyps with occasional formation of mucosal bridge being most frequently seen(19 of 31 cases), followed in the order of frequency by granulomatous and adenomatous polyps.

 Adenomatous polyps were divided into five groups according to the degree of epithelial atypia. Endoscopic and histological features were compared with one another in these groups.

 Differentiation of benign adenomatous polyps from polypoid cancer by endoscopy is very difficult. In one case of our series, a small pedunculated polypoid lesion with smooth surface and without redness proved to belong to Group V, namely “carcinoma in situ”.

 The significance of dissecting microscopic examinations in the study of atypia of adenomatous polyps is presented.Under the dissecting microscope, malignant polyps revealed irregular gland opening, associated with tortuosity and hypervascularity of the surrounding vessels.

Copyright © 1974, Igaku-Shoin Ltd. All rights reserved.


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