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要旨 大腸癌の拾い上げ診断における内視鏡検査と注腸造影検査の診断能の比較を試みた.注腸造影検査は,全大腸内視鏡検査と比較すると,5mm以上の病変では90%程度の感度であった.しかし,注腸造影検査では,右側結腸の平坦な病変では10mm以上のsm癌でも拾い上げ診断能は不十分と考えられた.また,5mm以下の小病変では注腸造影検査による拾い上げ診断は,感度,特異度ともに低く,スクリーニング検査として成り立たない.以上から,拾い上げ診断には原則として全大腸内視鏡検査が必要と思われ,注腸造影検査を用いる場合には,検査の盲点を熟知し,よく注意を払って撮影,読影を行う必要があると考えられた.
We compared barium (Ba) enema with colonoscopy for the screening examination of colon cancer. Compared to the total colonoscopy, the sensitivity of Ba enema was about 90% for the lesion more than 5 mm in size. But, Ba enema was not regarded as a sufficient examination for the flat lesion in the right side hemicolon, because even a sm cancer more than 10 mm in size may not be detected by Ba enema. The sensitivity and specificity of Ba enema for the small lesion less than 5 mm in size were not satisfactory for the screening examination. In conclusion, total colonoscopy is necessary for the routine screening examination of colon cancer. If Ba enema was chosen as a screening examination, shooting and reading of the film should be carefully done in awareness of blind spots of the examination.
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