小肠平滑肌肉瘤是原发性小肠恶性肿瘤，临床缺乏特征性表现，诊断困难，极易误诊。现将我们两院经手术和病理证实的２６例分析报道如下。１临床资料一般情况：男性２０例，女性６例，年龄３０～７４岁，平均４９６岁，５０岁以上者１６例（６１５％）。Ｂ型血者１２例... Intestinal leiomyosarcoma is a primary malignant tumor of the small intestine. It lacks the characteristic clinical features. It is difficult to diagnose and is easily misdiagnosed. The analysis of 26 cases confirmed by surgery and pathology in our two hospitals is reported below. 1 Clinical data General conditions: 20 males and 6 females, aged 30 to 74 years, an average of 49 to 6 years old, and more than 50 years old in 16 cases (61.5%). Type B blood in 12 cases...