Radiographic and Endoscopic Differences Between Cap Polyposis and Mucosal Prolapse Syndrome Motohiro Esaki 1 , Takayuki Matsumoto 2 1Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University 2Department of Endoscopic Diagnostics and Therapeutics, Kyushu University Hospital Keyword: mucosal prolapse syndrome , cap polyposis , 臨床像 , 大腸X線 , 大腸内視鏡 pp.671-681
Published Date 2002/4/25
DOI https://doi.org/10.11477/mf.1403103511
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 In order to clarify the difference between cap polyposis (CP) and mucosal prolapse syndrome (MPS), radiographic and endoscopic appearance was investigated in six cases of CP and 10 cases of MPS. Hypoproteinemia was noted in four cases of CP. Radiographically, multiple protrusions, predominantly located in the anterior wall of the rectum, were characteristic of MPS, while protrusions were located circumferentially in the rectum and the proximal part of the colon in CP. Under endoscopy, whitish nodular protrusions were found in seven cases and edematous mucosa in three cases of MPS. The rectal protrusions of CP were characterized by reddish nodular protrusions in four cases and by flat-topped protrusions with central depression in two cases. However, the configuration of the protrusions in the proximal part of the colon was similar in all cases of CP. Diminutive white specks were observed in the intervening mucosa of CP, while such specks were not found in MPS. Based on these findings, we concluded that CP should be distinguished from MPS.

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