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要旨 アミロイドーシスの小腸病変の特徴を明らかにするために,自験消化管アミロイドーシス症例の中でダブルバルーン小腸内視鏡ないしカプセル小腸内視鏡検査を施行した計14症例を対象として,その所見を中心に検討した.14例の内訳はAA型11例,AL型2例,Aβ2M型1例であった.内視鏡所見を検討すると,AA型は微細顆粒状粘膜面が特徴的であったが,NSAIDs常用者5例中3例で下部小腸優位のびらん・小潰瘍の多発を認めた.AL型では多発性の粘膜下腫瘍様隆起とKerckring皺襞肥厚像を,Aβ2M型ではKerckring皺襞の肥厚像を認めた.
To determine the endoscopic findings of amyloidosis of the small intestine, we reviewed 14 subjects with enteroscopically verified lesions. In 11 cases of AA amyloidosis, a mucosal pattern with innumerable fine granular elevations was evident, which correlated with expansion of the amyloid deposits in the lamina propria. In two patients with AL amyloidosis, there were polypoid protrusions and invariable thickening of the folds, which reflected massive amyloid deposits in the muscularis mucosa, submucosa, and muscularis propria. Three of five chronic NSAID users with AA amyloidosis had multiple mucosal defects in the ileum.
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