小肠肿瘤的发病率约占胃肠道肿瘤的2％，其中约3／4为恶性。在诊断上容易被忽略。我院外科自1993～1996年共收治小肠恶性肿瘤4例，报告如下。1病例介绍例1：男，8岁。反复发作腹胀，腹痛，呕吐，停止肛门排气排便月余收住院。查体：患儿消瘦，腹胀，右下腹可触及5cm×5cm×3cm The incidence of small intestinal tumors accounts for about 2% of gastrointestinal tumors, of which about 3/4 is malignant. Diagnostically easy to ignore. In our hospital from 1993 to 1996, 4 cases of malignant tumors of the small intestine were treated. The report is as follows. 1 Case Introduction Example 1: Male, 8 years old. Repeated episodes of abdominal distention, abdominal pain, vomiting, and stop anus exhaust defecation for more than a month. Physical examination: Children with weight loss, bloating, right lower abdomen can touch 5cm × 5cm × 3cm