小腸癌の深達度診断—X線・内視鏡診断

Diagnosis of Tumor Invasion Depth for Primary Small Bowel Cancer：X-Ray and Endoscopic Diagnosis

要旨●カプセル内視鏡やバルーン内視鏡の普及により，原発性小腸癌の内視鏡診断は容易になった．しかし，十二指腸を除く原発性小腸癌の多くは進行癌で診断される．内視鏡検査およびX線造影検査による進行癌の診断は比較的容易であるが，早期癌の診断に関してはまだまだ一般化していない．また，原発性小腸癌に対する画像強調内視鏡や超音波内視鏡のエビデンスも十分ではない．本稿では，現時点における原発性小腸癌の深達度診断に関して，内視鏡所見，X線造影所見を中心に概説する．

　The widespread use of capsule endoscopy and balloon endoscopy has resulted in an easy endoscopic diagnosis of primary small-bowel cancers. However, most primary small-bowel cancers, excluding those in the duodenum, are diagnosed at an advanced stage. While diagnosing advanced cancers using endoscopy and small-bowel series is relatively straightforward, the diagnosis of early stage cancers has not yet been widely established. In addition, there is insufficient evidence regarding the diagnosis of primary small-bowel cancer using image-enhanced endoscopy or endoscopic ultrasonography. This paper provides an overview of the current state of depth diagnosis for primary small-bowel cancer, focusing on the findings of enteroscopy and small-bowel series.