胃肠道间质瘤(GISTs)过去常被认为起源于平滑肌,近年来随着胚胎学、病理学、影像学研究的深入,其被证实起源于胃肠道原始间充质细胞,是一种非上皮性肿瘤,是消化道独立的一类间叶性肿瘤,是胃肠道最常见的间叶组织源性肿瘤[1]。据文献报道,GISTs的发病率为(1~2)/10万人,占胃肠道肿瘤的3%。其中70%发生在胃,20%~30%发生在小肠,其他部位如结肠、食管占比<10%。故鉴于小肠肿瘤诊断的复杂性, Gastrointestinal stromal tumors (GISTs) used to be thought to originate from the smooth muscle. In recent years, along with embryological, pathological and imaging studies, GISTs have been proven to originate from the primitive mesenchymal cells of the gastrointestinal tract. Non-epithelial tumors, a group of mesenchymal independent tumors, is the most common gastrointestinal mesenchymal tumor [1]. According to the literature, the incidence of GISTs (1 ~ 2) / 10 million, accounting for 3% of gastrointestinal tumors. 70% of which occur in the stomach, 20% to 30% occur in the small intestine, other parts such as colon, esophagus accounted for <10%. Therefore, in view of the complexity of the diagnosis of small bowel tumors,