Endoscopic Ultrasonography of Superficial Early Colorectal Cancer.

概要

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Endoscopic ultrasonography (EUS) was performed in 53 lesions of early colorectal cancer by using 12MHz-EUS and 15⋅ 20MHz-sonoprobe system. The mucosal and submucosal layer (m, sm) were detected clearly by these apparatues, especially the muscularis mucosa was clearly by the sonoprobe system. The submucosal invasion was dividable into two categories by the sonogram-sm- slight (sm1) and sm-massive (sm2, Sm3). The depth of invasion was accurately predicated by EUS. The accuracy rate in m cancer was 80.6%, sm-slight cancer was 80.8%, and sm-massive cancer was 83.3%. The accuracy rate in m and sm-slight group was 92.7% and sm-massive and pin group was 94.4%. The m and sm-slight cancers should be treated initially by endoscopical local resection, and the sm-massive cancer should be resected curatively. Therefore, the ultrasonography by 12MHz-EUS and sonoprobe system (15⋅20MHz) was very useful for deciding the therapeutic plan for the superficial colorectal cancer.
日本大腸肛門病学会の論文