本文报告的6例均经病理检查证实为小肠原发性肿瘤:十二指肠腺癌3例、回肠腺癌1例、平滑肌肉瘤及平滑肌瘤恶变各1例。男性4例,女性2例。年龄40～66岁,4例在50岁以上。从发病到就诊时间为1～4个月。本组病例临床症状主要表现为不同程度的上腹部疼痛、腹胀、梗阻、黑便、重度 All 6 cases reported in this article were confirmed by pathological examination as primary small intestine tumors: 3 cases of duodenal adenocarcinoma, 1 case of ileal adenocarcinoma, 1 case of leiomyosarcoma and 1 case of leiomyomatosis. There were 4 males and 2 females. Age 40 to 66 years, 4 cases over 50 years old. The time from onset to treatment is 1 to 4 months. The clinical symptoms of this group mainly manifested in different degrees of epigastric pain, bloating, obstruction, melena, severe