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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。
Objective To investigate the imaging features of duodenal exophytic leiomyosarcoma in the elderly. Methods Six cases were examined by ultrasound (US) and gastrointestinal barium meal examination, 4 of them were examined by CT, 2 cases were examined by angiography, and 6 cases were confirmed by operation and pathology. Results The main imaging features of duodenal leiomyosarcoma were: (1) Intestinal stenosis and change in external pressure; (2) Extraduodenal mass in duodenum; (3) Tumor necrosis and ulceration; (4) CT showed high circumference Density zone, with a low density area in the center; (5) Angiography shows the supply of blood from the duodenal artery and shows a vascular tumor-like appearance. Conclusion X-ray barium meal examination and CT scan can make accurate diagnosis of duodenal leiomyosarcoma. Angiography is a supplementary diagnostic method.