十二指腸癌の深達度診断—内視鏡診断

Depth Diagnosis of Duodenal Cancer：Endoscopic Diagnosis

要旨●表在性非乳頭部十二指腸上皮性腫瘍（SNADET）の多くは粘膜内病変であり，粘膜下層浸潤癌（SM癌）はまれである．現在のところSNADETの深達度診断は他の消化管臓器における内視鏡診断に準じて行われている．しかしながら深達度診断におけるIEEや拡大内視鏡の有用性に関する報告はなく，EUSの位置付けも不明である．本邦からの十二指腸上皮性腫瘍に対する内視鏡診断体系の確立が期待される．

　Superficial nonampullary duodenal epithelial tumors are predominantly intramucosal lesions, while submucosal invasive carcinomas are rare. Currently, depth diagnosis of duodenal cancer relies on endoscopic methods established for other gastrointestinal tract cancers, such as those of the stomach and colon. However, the utility of image-enhanced endoscopy and magnifying endoscopy for assessing invasion depth has not been reported, and the role of ultrasound endoscopy remains unclear. Further development of a comprehensive endoscopic diagnostic system for duodenal epithelial tumors, particularly from Japan is highly anticipated.