多层螺旋CT对下腔静脉发育异常的影像学诊断

Imaging diagnosis of dysplasia of inferior vena cava by MSCT

目的 探讨下腔静脉变异的CT表现。方法 42例下腔静脉异常的患者行腹部平扫、增强扫描或CTU检查,个别进行胸部平扫及增强扫描,对图像进行多平面重建,分析其影像学特点及征象。结果 下腔静脉肝段缺如伴奇静脉连接、主动脉后左肾静脉、肝静脉直接汇入右心房1例,双下腔静脉3例,腔静脉后输尿管5例,主动脉后左肾静脉15例,环主动脉左肾静脉18例。结论 MSCT能清晰显示下腔静脉畸形的类型,是诊断下腔静脉异常的重要检查方法。

Objective To investigate the CT manifestations of inferior vena cava variation. Methods A total of 42patients with inferior vena cava abnormalities underwent abdominal plain scan, enhanced scan or CTU examination, and individual patients underwent chest plain scan and enhanced scan. Multi-plane reconstruction was carried out to analyze the imaging characteristics and signs. Results There was 1 case with absence of the hepatic segment of the inferior vena cava complicated with azygos vein connection and posterior aortic left renal vein and hepatic vein directly into the right atrium, 3cases with double inferior vena cava, 5 cases with retrovena ureter, 15 cases with posterior aortic left renal vein, and 18 cases with circumaortic renal vein. Conclusion MSCT can clearly show the types of inferior vena cava malformation and is an important examination for diagnosis of inferior vena cava abnormalities.