Department of Radiology, Radiologia d'Urgenza, AOU IRCCS San Martino IST, Genoa, Italy.
Department of Radiology, University of Trieste, Trieste, Italy.
Radiol Med. 2019 Jun;124(6):445-449. doi: 10.1007/s11547-019-00991-4. Epub 2019 Feb 1.
To describe the CT findings in eight patients with left-sided inferior vena cava (IVC) in whom the left renal artery presented a precaval course (pLRA).
We searched the teaching files of six radiology departments for patients with pLRAs. Eight patients were found, and the available imaging studies and clinical histories were reviewed. Associated vascular and renal anomalies were noted.
No patient had been examined for problems related to the vascular anomaly found. Four had a double IVC and two a solitary left IVC; in all, the left-sided IVCs had hemiazygos continuation. One patient had situs viscerum inversus. In one case, there was a left kidney in left iliac fossa.
Although rare and probably overlooked, a pLRAs can be encountered in patients with situs viscerum inversus or presenting a left-sided IVC with hemiazygos continuation. These vessels can cause technical problems during surgery at the left renal hilum and should be specifically searched for in patients with vascular anomalies.
描述 8 例左侧下腔静脉（IVC）中左肾动脉呈前置（pLRA）的 CT 表现。
我们在 6 个放射科的教学档案中搜索具有 pLRA 的患者。发现了 8 例患者，并对其可用的影像学研究和临床病史进行了回顾。注意到了相关的血管和肾脏异常。
没有患者接受过与发现的血管异常相关的检查。4 例有双 IVC，2 例有孤立的左 IVC；所有患者的左侧 IVC 均有半奇静脉延续。1 例患者内脏位置颠倒。在 1 例中，左肾位于左髂窝。
尽管罕见且可能被忽视，但内脏位置颠倒或具有半奇静脉延续的左侧 IVC 的患者可能会遇到 pLRA。这些血管可能会在左肾门手术时引起技术问题，因此应在存在血管异常的患者中专门寻找这些血管。
