原发性小肠恶性肿瘤诊断困难,因其临床表现模糊。最可能原因为:首发症状后长时间才就医;医师未予适当诊断性检测;对检测结果作了不正确解释。本文对此作了评述。病人和方法从1967年1月至1988年12月,对诊断为原发性十二指肠、空肠、回肠恶性肿瘤患者的病史、X 线报告、手术圾病理报告作了复习,排除壶腹及回盲瓣肿瘤。 Diagnosis of primary small intestinal malignancy difficult because of its clinical manifestations of vague. The most likely reasons are: The first symptom after a long period of time to seek medical treatment; physicians not appropriate diagnostic test; the test results were incorrectly explained. This article made a comment. Patients and Methods From January 1967 to December 1988, the patient’s history of diagnosis of primary duodenum, jejunum, and ileal malignant tumor, X-ray reports and surgical pathology reports were reviewed to exclude ampulla and Ileocecal valve tumor.