原发性小肠肉瘤为一种较罕见的消化道恶性肿瘤。本文报告5例并结合有关文献进行讨论。病例报告例1,男性,36岁。1970年7月28日因乏力消瘦4月,阵发性腹痛、腹泻并发现腹块3月入院。入院检查:右下腹可触及一拳大、边界不清之坚硬肿块,有部分小肠梗阻体征。GI提示末端回肠明显狭窄,盲肠、升结肠亦有浸润僵硬现象。手术及术中发现:距盲肠10厘米处末端回肠系膜侧有 Primary small intestinal sarcoma is a rare malignant tumor of the digestive tract. This article reports 5 cases and discusses with related literature. Case report example 1, male, 36 years old. On July 28, 1970, due to lack of energy, in April, she suffered paroxysmal abdominal pain and diarrhea and found that her abdominal mass was admitted to hospital in March. Admission examination: The right lower abdomen can touch a hard mass with a large fist and an unclear boundary, and there are some small intestinal obstruction signs. The GI revealed a marked narrowing of the distal ileum and infiltration of the cecum and ascending colon. Surgery and intraoperative findings: 10 cm from the cecum at the end of the ileum mesentery