我们从1966年～1989年间诊治原发性小肠系膜平滑肌肉瘤3例,报告如下。例1,男,57岁,因中上腹部不适月余,摔倒后阵发性腹痛、呕吐胃肠液及咖啡色液一天于1978年10月8日入院。检查:T38.1℃,中上腹部膨隆,可扪及1拳头大包块,略活动,有压痛及反跳痛,肠鸣音亢进。腹部透视提示中腹部占位性病变,肠梗阻。行剖腹探查术发现空肠下段系膜肿瘤约11.5×13×14.6cm,偏于脊柱左侧,牵拉空肠使其下段不全扭转,扭转肠段水肿,有出血点及坏 We diagnosed and treated 3 cases of primary small mesenteric leiomyosarcoma between 1966 and 1989. The report is as follows. Example 1, male, 57 years old, was admitted to hospital on October 8th, 1978, because of discomfort in the mid-upper abdomen for more than a month. After falling down, paroxysmal abdominal pain, vomiting, gastrointestinal fluid, and brown fluid were admitted on October 8, 1978. Check: T38.1 °C, bulging in the middle and upper abdomen, palpable and fist mass, slight activity, tenderness and rebound tenderness, bowel sounds hyperthyroidism. Abdominal fluoroscopy hinted at mid-abdominal space-occupying lesions and intestinal obstruction. The exploratory laparotomy found that the lower jejunum mesenteric tumor was approximately 11.5×13×14.6 cm, biased to the left side of the spine, pulling the jejunum to incompletely reverse the lower segment, and reversed the bowel edema, with bleeding points and bad.