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What is the Difference Between Cap Polyposis and Mucosal Prolapse Syndrome? Atsuo Kitano 1 1Gastroenterological Center, Higashi Sumiyoshi Morimoto Hospital Keyword: cap polyposis , 粘膜脱症候群 , 臨床症状 , 内視鏡像 , 治療経過 pp.707-714
Published Date 2002/4/25
DOI https://doi.org/10.11477/mf.1403103516
  • Abstract
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 The symptoms of cap polyposis (CP) are mucous diarrhea and abdominal pain, and CP may cause marked reduction in serum total protein and albumin. Lesions are mainly located in the sigmoid colon and may extend to the oral side of the colon. The lesions consist of flatly elevated or wide-based polyps covered with cap with whitish slough and erosion on the top. The circularly arranged lesions are seen scatteredly on the apices of the circular mucosal folds. The cap consists of inflammatory granular tissue. The other pathological findings of CP such as superficial mucosal atrophy, hyperextension of the glands, mild cellular infiltration, neovascularization and muscular fibrosis in the proper lamina are similar to those of the mucosal prolapse syndrome (MPS).

 The chief complaint of MPS is lower gastrointestinal bleeding and MPS is commonly seen in a young strainer with mucosal prolapse of the rectum. MPS are found mainly as the protruding type or ulcerative type on the anterior wall of the rectum. Although CP and MPS are pathohistologically alike, both of them may be differentiated by clinical pictures and healing process and classified as different entities of the disease.


Copyright © 2002, 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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