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Hematochezia and Colorectal Neoplastic Lesions Hiroshi Kashida 1 , Shin-ei Kudo 1 , Tsukasa Takeuchi 1 1Digestive Disease Center, Showa University Northern Yokohama Hospital Keyword: 血便 , 下血 , 大腸癌 , 大腸腫瘍 , 便潜血 pp.639-642
Published Date 2005/4/25
DOI https://doi.org/10.11477/mf.1403100083
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 Colorectal cancers do not frequently bleed massively. It is even rarer that colorectal adenomas, except for very large ones, cause macroscopic rectal bleeding. On the other hand, hematochezia is the most frequently encountered symptom in cases with colorectal cancer. Adenomas and/or cancers were detected in 17 % of the patients who underwent total colonoscopic examination due to hematochezia, although the neoplasias which were found were not always considered to be the source of the bleeding. Even in patients with rectal bleeding ascribable to hemorrhoid or diverticulum, a colonoscopic examination should be performed bearing in mind the possible existence of a neoplasm. The symptomatic colorectal cancers were more advanced than those which were free of symptoms and which were found by colonoscopic examination performed because of positive fecal occult blood. Immunological fecal occult blood test is imperfect in both sensitivity or specificity, but is useful for picking up candidates for colonoscopy.


Copyright © 2005, 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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