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目的 探讨老年人十二指肠外生型平滑肌肉瘤的影像学特征.方法 6 例经超声学(US)和胃肠钡餐透视检查,其中4 例经CT检查,2 例经血管造影检查,6 例患者均经手术及病理学证实.结果 十二指肠平滑肌肉瘤的主要影像学有:(1)肠腔狭窄和外压改变;(2)十二指肠腔外肿块;(3)肿瘤坏死和溃疡;(4)CT显示周围高密度带,伴中心部低密度区;(5)血管造影表现为十二指肠动脉供血,呈富血管性肿瘤表现.结论 X线钡餐检查和CT扫描对十二指肠平滑肌肉瘤能作出比较准确的诊断,血管造影是一种补充性诊断方法.“,”To investigate the imaging features of primary exogenic duodenal leiomyosarcomas.Methods Six cases, three male, three female with average of 59.67 years of age(55~72). The examination consisted of ultrasonic imaging, barium studies, CT(4 cases) and angiography(2 cases). The six cases have been confirmed by operation and histological examinations. Results The main imaging manifestation of duodenal leiomyosarcomas were as follow:(1)Stenosis and external pressure,(2)Extraduodenal masses,(3)Tumor necrosis and ulceration,(4)CT features central zones of low density were surround by thickness of soft tissue density,(5)Angiographic manifestion is usually predominant blood supply.Conclusions X ray barium studies and CT are shown to yield more accurate diagnosis. Angiography is good complementary technique to confirm the diagnosis.