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要旨 隆起型早期胃癌36例,胃腺腫34例,腺腫内癌14例に対し,NBI併用拡大内視鏡を施行し,表面血管,表面構造について検討した.血管パターンは網目,楕円,不規則血管,表面構造は敷石状構造,管状構造,小型敷石状構造,大小不同敷石構造に渦巻血管を伴うものに分けられた.隆起型早期胃癌の高分化腺癌では網目血管36%,敷石状構造50%,管状構造6%にみられ,敷石状構造に代表される表面構造が主体であった.胃腺腫では敷石状構造38%,管状構造29%であり,網目血管を示すものは21%であった.腺腫内癌では網目血管36%,敷石状構造50%であったが 副所見も含めると79%に網目構造がみられた.腺腫内癌の術前診断にNBI併用拡大観察を施行し,網目血管の所見が有用であると考えられた.
36 cases of elevated early gastric cancers and 34 cases of adenomas were examined concerning surface microvascular structure and surface structure using magnified NBI.
Elevated early gastric cancers showed a fine network surface microvascular structure and surface structure like cobblestone. 36% of cases showed a fine network pattern. 50% cases showed cobblestone-like surface structure and6% of cases showed tubular surface structure. On the other hand, adenoma showed cobblestone-like surface structure (38%), tubular surface structure (29%) and fine network pattern (21%). Cancer with adenoma showed fine network pattern (35%) and cobblestone-like surface structure (50%). The main surface structures are fine network pattern and cobblestone-like surface structure in cancer with adenoma. But fine network pattern was observed in 79% of cancer cases with adenoma as minor findings. Fine network pattern is a finding which is useful in the differential diagnosis adenoma and cancer with adenoma.
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