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胃癌限于粘膜层或粘膜下层不累及固有肌层时称为早期胃癌。在日本,早期胃癌占胃癌总数的30％。虽然有很多内窥镜诊断方法和工具可用,包括色素内窥镜,但最大直径小于5mm的微小胃癌的发现仍是困难的。由于由胃切除所得微小胃癌标本经组织学检查一半已侵及粘膜下层,因此在术前能作出微小胃癌的内窥镜诊断是重要的。此外,微小
The stomach cancer is limited to the early gastric cancer when it is not confined to the mucous layer or the submucosa involving the muscularis propria. In Japan, early gastric cancer accounts for 30% of the total number of gastric cancers. Although many endoscopic diagnostic methods and tools are available, including pigmented endoscopes, the discovery of tiny gastric cancers with a maximum diameter of less than 5 mm is still difficult. Since half of the minute gastric cancer specimens obtained by gastrectomy have been invaded into the submucosa by half histological examination, it is important to make an endoscopic diagnosis of tiny gastric cancers before surgery. In addition, tiny