Obscure gastrointestinal bleeding is defined as bleeding of unknown origin that persists or recurs after a negative initial endoscopic evaluation of both the upper and lower gastrointestinal tracts.
来源不明性胃肠出血是指首次上、下消化管内窥镜检查都阴性、原发部位不明的持续或反复性出血。
Endoscopic evaluation and histology correlation are emphasized.
内镜所见和组织学的关系也有所强调。
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