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目的：评价CT、彩超诊断肾癌合并下腔静脉癌栓的应用价值。方法：对18例术前经CT、彩超诊断为肾癌下腔静脉癌检病人的影像检查结果与手术病理诊断进行对照分析。结果：CT诊断准确度72．2％、敏感度714％、特异度75％、阳性预测值90．9％；彩超则分别为72.7％、75％、66.7％、857％；联合检查组则为90．9％、100％、66．7％及88．9％，联合检查诊断准确度明显优于CT或彩超单项检查。结论：CT或彩超诊断肾癌下胜静脉癌栓有一定价值，联合检查可明显提高诊断能力，并可替代创伤性大的下腔静脉造影。
Objective: To evaluate the value of CT and color Doppler ultrasound in the diagnosis of renal cancer with inferior vena cava tumor thrombus. Methods: 18 cases of preoperative CT, color Doppler ultrasound diagnosis of renal cell carcinoma of inferior vena cava in patients with imaging examination results and surgical pathological diagnosis were analyzed. Results: The diagnostic accuracy of CT was 72.2%, the sensitivity was 714%, the specificity was 75%, the positive predictive value was 90.9%; the color Doppler ultrasound was 72.7%, 75%, 66.7%, 857% respectively; 90.9%, 100%, 66.7% and 88.9% respectively. The diagnostic accuracy of combined examination was significantly better than that of CT or color ultrasonography. Conclusion: CT or color Doppler ultrasound in the diagnosis of renal cell carcinoma under the vein thrombosis have some value, combined examination can significantly improve the diagnostic ability, and can replace traumatic large IVC.