Gastrointestinal stromal tumor(GIST),which was previously classified as GI leiomyoma/leiomyosarcoma and schwannoma,is the most common type in mesenchymal tumors of the GI tract.

• 胃肠道基质瘤(GIST)是胃肠道间叶性肿瘤中最常见的类型,而早先被认为是胃肠道平滑肌瘤/平滑肌肉瘤和神经鞘瘤。