超音波内視鏡による胃癌深達度診断の検討

概要

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A study was made on the diagnosis of the depth of cancerous invasion by means of endoscopic ultrasonography (EUS). In 81 gastric cancers of resected stomach, ultrasonographic appearance of the deepest layer in the cancerous invasion was noticed. Ultrasonographic pattern of the third layer was classified into three groups (Type I, II, III) and ultrasonographic pattern of the fourth layer into two groups (Type A, B). In the protruded type and IIa+IIc type of early gastric cancer, cancerous tissue in all cases of Type I limited in the mucosa, and in all cases of Type III invaded into the submucosa. In the depressive type of early gastric cancer, cancerous tissue in 67% of cases in Type I limited in the mucosa, in 64% of cases in Type II showed the submucosal invasion, in all cases of Type III invaded into the submucosa. The ultrasonographic findings of Type B of advanced gastric cancer signified scirrhous cancerous invasion. EUS were performed in 35 patients clinically. The degree of cancerous invasion was able to be diagnosed with EUS more aculately than with X-ray and endoscopic examination. Extraserosal invasion was diagnosed only by EUS.
財団法人日本消化器病学会の論文