Early gastric cancer (EGC) is defined as gastric cancer in which tumor invasion is limited to the mucosa or submucosa, regardless of lymph node involvement.1 En-doscopic mucosal resection (EMR) has been widely accepted as a standard treatment for EGC with a negligible risk of lymph node metastasis, especially in Asian countries which have a high prevalence of gastric cancer.2,3 Standard indications for EMR of EGC include differentiated elevated cancers less than 2 cm in size and depressed cancers without ulceration less than 1 cm in size.4 However, these criteria have been considered as too strict and leading to unnecessary surgery.5 In Japan, expanded indications have been proposed to include other lesions with a negligible risk of lymph node metastasis, such as (1) mucosal cancer without ulcer findings irrespective of tumor size, (2) mucosal cancer with ulcer findings <30 mm, and (3) minute (<500 um from the muscularis mucosae) submucosal invasive cancers <30 mm in size.6 With the development of Endoscopic submucosal dissection (ESD), en-bloc resections of larger or ulcerated lesions have become possible, thus resulting in a more accurate histopathologic diagnosis and reduced local recurrence.5 Currently, ESD is rapidly gaining popularity as the first-line treatment for EGC in Korea and Japan.Patient survival data after endoscopic treatment for EGC, including long-term data after EMR and recent data after ESD, will be presented in this review.
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机译：早期胃癌（EGC）被定义为胃癌，其中肿瘤侵袭仅限于粘膜或粘膜肿，无论淋巴结是否参与其中含有淋巴结粘膜切除（EMR）被广泛接受为EGC的标准治疗淋巴结转移的局部风险可忽略不计，特别是在胃癌的患者患病率高的亚洲国家。 .4但是，这些标准被认为是过于严格的，导致日本的不必要的手术，已经提出了扩展的适应症，包括其他病变，其淋巴结转移的风险可忽略不计，例如没有溃疡发现的粘膜癌无论肿瘤大小，（2）粘膜癌是否具有溃疡发现<30毫米，（3）分钟（来自肌肉粘膜500μm）粘膜侵入性癌症<30 mm .6与de内窥镜粘膜粘膜粘膜（ESD）的开发，较大或溃烂性病变的浓缩植物切除，因此导致更准确的组织病理学诊断和降低局部复发.5目前，ESD正在迅速获得普及作为第一线治疗EGC在韩国和日本。在本次审查中，将在EMR和ESD之后的最近数据之后包括长期数据，包括长期数据后的存活数据。
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