Abstract
症例は45歳の男性で，繰り返す下血を主訴に精査加療目的にて来院した．下部消化管内視鏡施行時に小腸からの出血を疑われ，小腸全体の精査および加療目的で2008年6月内科を紹介受診した．カプセル内視鏡および経肛門的ダブルバルーン小腸内視鏡でBauhin弁より1.5m程口側に陥凹面を形成する粘膜下腫瘍様病変を認めた．生検で腺癌が認められたため，原発性小腸癌の術前診断で回腸部分切除術を施行した．切除標本の肉眼所見で表面に陥凹を有する1.2×0.8cmの黄色の隆起性病変を認め，病理組織学的検査所見で回腸カルチノイドと診断された．本邦では回腸カルチノイドはまれであり，若干の文献的検討を加え，報告する．
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