相部 剛¹, 大谷 達夫¹, 吉田 智治¹, 野口 隆義¹, 播磨 一雄¹, 河原 清博¹, 富士 匡¹, 竹本 忠良¹, 河村 奨²

Tsuyoshi AIBE¹, Tatsuo OOTANI¹, Tomoharu YOSHIDA¹, Takayoshi NOGUCHI¹, Kazuo HARIMA¹, Kiyohiro KAWAHARA¹, Tadasu FUJI¹, Tadayoshi TAKEMOTO¹, Susumu KAWAMURA²

¹山口大学医学部第一内科, ²山口労災病院内科

¹The First Department of Internal Medicine, Yamaguchi University School of Medicine, ²Department of Internal Medicine, Yamaguchi Rosai Hospital

キーワード : Endoscopic ultrasonography, Early gastrointestinal Cancer, Echo like tumor

　We tried to diagnose the depth of invasion of early gastrointestinal cancer by comparing endoscopic ultrasonograms of resected specimens with corresponding histology. The results were as follows; 1) In cases of a depressed type of early cancer, we could diagnose the depth of invasion of cancer by observing the change of an echogram of the submucosal layer (the 3rd layer). 2) In cases of early cancer which invaded to the submucosal layer deeply, an echogram of the submucosal layer was depressed and deviated to an echogram of the muscular layer (the 4th layer). 3) An echo like tumor was visualized under a tumor echo in an elevated type of early cancer and interruptions of an echogram of the submucosal layer were demonstrated in a depressed type of early cancer with fibrosis.