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目的 探讨下腔静脉肿瘤的超声影像学表现、诊断与鉴别诊断.方法 对32例下腔静脉肿瘤的超声、CT、手术病理结果进行回顾性分析.结果 平滑肌肉瘤2例,静脉内平滑肌瘤病(IVL)8例,转移性肿瘤22例(原发病:肝癌8例,胆管癌2例,肾上腺癌2例,肾癌7例,骨盆软骨肉瘤3例).结论 超声可显示下腔静脉肿瘤病变范围、形态、内部回声、与管壁的关系、肿瘤血供及下腔静脉血流情况,为诊断与鉴别诊断提供依据.“,”Objective To investigate ultrasonic imaging features, diagnosis and differentiation of tumors in the inferior vena cava (IVC).Methods The data of ultrasonography, CT and pathology of 32 patients was retrospectively analysed.Results Among the 32 cases, there were 2 cases of leiomyosarcoma, 8 cases of intravenous leiomyomatosis and 22 cases of tumor thrombus (including 8 cases of hepatocellular carcinoma, 2 case of cholangiocarcinoma, 2 cases of adrenal carcinoma, 7 cases of renal cell carcinoma, and 3 cases of pelvic chondrosarcoma).Conclusions IVC tumors have some specific ultrasonic features, ultrasonography can reveal the extension, morphology, internal structure and blood flow in the tumor and IVC, and provides diagnostic information.