下腔静脉后输尿管综合影像特征分析

目的：探讨下腔静脉后输尿管的综合影像特点。材料与方法：经B超、静脉尿路造影、逆行性肾盂造影及CT扫描等综合影像检查，诊断下腔静脉后输尿管4例，并结合有关文献，对下腔静脉后输尿管的综合影像特点进行回顾性分析。结果：本组4例均为低襻型。B超检查提示右肾盂积水和上段输尿管扩张以及肾结石，静脉尿路造影呈典型的反“J”状，逆行性肾盂造影呈“S”形弯曲，CT扫描加二维重建显示肾盂积水呈囊状，下腔静脉压迫输尿管，受压段细小呈“蝌蚪”状。结论：影像学协同检查能准确显示下腔静脉后输尿管的异常走向、受压的具体位置、肾盂及输尿管扩张积水的程度，为临床治疗提供准确影像依据。

Imaging Analysis of Retrocaval Ureter

Purpose： To study the imaging feature of retrocaval ureter. Materials and Methods： Imaging feature of 4 cases retrocaval ureter by ultrasound, vein urography, retrograde pyelogram（RPG） and CT combine relevant literature were analyzed retrospectively. Results： This 4 cases were low loop model. Their ultrasound findings were the right nephrydrosis and superior segment ureterectasia as well kidney stone. Their vein urography show against ＂J＂. RPG was similar to ＂S＂. They show capsular nephrydrosis and ＂tadpole＂ ureter oppressed by inferior caval vein. Conclusion： Many imageologic coopelation examine can show abnormality of retrocaval ureter exactly.