狭窄を来す大腸疾患─内視鏡診断を中心に

Colonic Disease Causing Stenosis: Focusing on Endoscopic Diagnosis

要旨●狭窄を来す大腸疾患の診断は，（1）基礎疾患や既往歴などを含めた臨床像，（2）発症部位，（3）内視鏡的所見を考慮することで，ある程度可能である．しかし，高度の狭窄病変では，全体像を観察することは困難であるため各種のモダリティ（内視鏡，X線造影，EUS，CT，MRIなど）を併用して相補的に行う必要がある．本稿では狭窄を来す大腸疾患の診断の体系とプロセスについて実際の画像所見を提示しながら，解説する．

　To some extent, colonic disease causing stenosis can be diagnosed by considering the following factors :（1）the clinical profile of the patient, including the underlying disease and medical history,（2）the site of onset, and（3）endoscopic findings. It is difficult, however, to gain an overall view in the presence of high-grade stenotic lesions, thus making it necessary to use a combination of each diagnostic modality（X-ray, ultrasound, computed tomography, and magnetic resonance imaging）in a complementary manner. In this paper, we discuss the findings of actual imaging related to the diagnostic system and processes.