PURPOSE The purpose of this study is to investigate the origin of the vascular structures in ectopic kidneys with multidetector computed tomography (CT). METHODS The abdominal CT images of 96 cases with 106 ectopic kidneys were retrospectively reviewed. The ectopic kidney location, type of ectopia, and the origins of renal arteries and veins of the ectopic kidneys were evaluated. The origins of the renal arteries and veins were classified as suprarenal aorta/inferior vena cava (IVC), normal origin, infrarenal aorta/IVC, aortic/IVC bifurcation, common iliac artery/vein, iliac bifurcation, internal iliac artery/vein, and external iliac artery/vein. Finally, the ectopic kidneys were classified according to the most common combinations of artery and vein origins. RESULTS The renal artery originated from the suprarenal aorta in 1 case, normal origin in 13 cases, the infrarenal aorta in 36 cases, aortic bifurcation in 50 cases, the common iliac artery in 17 cases, and the iliac artery bifurcation in 2 cases. The renal vein was of normal origin in 19 cases, originated from the infrarenal IVC in 44 cases, IVC bifurcation in 36 cases, the common iliac vein in 23 cases, the internal iliac vein in 1 case, and the external iliac vein in 1 case. We classified the artery and vein origins of the ectopic kidneys into 7 most common types and other less common types. A significant correlation was found between the level of the ectopic kidneys and the origin of the arteries and veins (P < 0.001). CONCLUSIONS Our study shows that the majority of ectopic kidneys have various origins of arterial and venous supply. We described the most common vascular origins of ectopic kidneys. Prior knowledge of these vascular variations may have important implications in preventing iatrogenic hemorrhage during surgery of patients with ectopic kidney.

中文翻译：

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用多探测器计算机断层扫描评估异位肾脏中血管结构的起源。

目的本研究的目的是利用多探测器计算机断层扫描（CT）研究异位肾脏中血管结构的起源。方法回顾性分析96例106例异位肾的腹部CT图像。评估了异位肾脏的位置，异种的类型以及异位肾脏的肾动脉和静脉的起源。肾动脉和静脉的起源分为肾上主动脉/下腔静脉（IVC），正常起源，肾下主动脉/ IVC，主动脉/ IVC分叉，common总动脉/静脉、,总叉、,内动脉/静脉和外动脉/静脉。最后，根据最常见的动脉和静脉起源对异位肾脏进行分类。结果1例肾动脉起源于肾上主动脉。正常起源13例，肾下主动脉36例，主动脉分叉50例，总动脉17例，动脉分叉2例。肾静脉正常起源19例，起源于肾下静脉IVC 44例，IVC分叉36例，the总静脉23例，内静脉1例，外静脉1例。我们将异位肾脏的动脉和静脉起源分为7种最常见的类型和其他较不常见的类型。发现异位肾脏的水平与动脉和静脉的起源之间存在显着相关性（P <0.001）。结论我们的研究表明，大多数异位肾脏具有多种动静脉供应来源。我们描述了异位肾脏最常见的血管起源。