原发性小肠肿瘤约占全身肿瘤的0.2%,占消化道肿瘤的4%,占胃肠道肿瘤的3%~6%,男女比率为(1~3)∶1,良恶性肿瘤比为1∶(2.6~4.6)[1-2]。以往数据表明空、回肠良性肿瘤以平滑肌瘤最多,近年的研究表明约75%的平滑肌瘤均应归入到胃肠间质瘤(GIST)中,故目前小肠良性肿瘤的常见程度依次 Primary small intestinal tumors account for about 0.2% of systemic tumors, accounting for 4% of gastrointestinal tumors, gastrointestinal tumors account for 3% to 6%, male to female ratio (1 ~ 3): 1, benign and malignant tumors than 1 : (2.6 ~ 4.6) [1-2]. Past data show that empty, ileum benign tumors to the most leiomyoma, recent studies have shown that about 75% of leiomyoma should be classified as gastrointestinal stromal tumors (GIST), so the common degree of benign small intestine in turn