传统上,胃肠道原发性间叶源性梭形细胞肿瘤几乎都归为平滑肌肿瘤,包括平滑肌瘤与平滑肌肉瘤及它们的各种亚型,但新近研究表明,大多数胃肠道间叶源性肿瘤既不同于典型的平滑肌瘤,也不同于雪旺瘤,而是一组具有不同特征的肿瘤,称为胃肠道间质瘤(ｇａｓｔｒｏｉｎｔｅｓｔｉｎａｌ Traditionally, primary mesenchymal spindle cell tumors of the gastrointestinal tract are almost always classified as smooth muscle tumors, including leiomyomas and leiomyosarcomas and their various subtypes, but recent studies have shown that most gastrointestinal tracts are Leaf-derived tumors are not only different from typical leiomyomas, but also different from Schwannomas. They are a group of tumors with different characteristics called gastrointestinal stromal tumors (gastrointestinal).