肠道基质肿瘤（GST）是低度恶性的肠壁内肿瘤、以往曾由于其类似平滑肌的镜检特点而被命名为平滑肌瘤或平滑肌肉瘤。近期文献提示其来源仍不明、故称为GST，这些肿瘤多来自肠壁肌固有层和粘膜肌层之间的组织，并可向肠腔和（或）浆膜层扩展。GST有增大趋势、应予切除。作者分析 Gastrointestinal stromal tumors (GST) are low-grade intra-intestinal tumors that were previously referred to as leiomyomas or leiomyosarcomas because of their microscopic appearance similar to smooth muscle. Recent literature suggests that the source is still unknown, so it is called GST. Most of these tumors originate from the tissue between the lamina propria of the intestinal wall and the muscularis mucosa, and can expand to the intestinal lumen and/or serosal layer. GST has an increasing trend and should be removed. Author analysis