Kabakus Ismail, Kocher Madison, Agha Ali, Burt Jeremy R
Radiology, Medical University of South Carolina, Charleston, USA.
Internal Medicine, University of Texas Health Science Center, Houston, USA.
Cureus. 2019 Dec 29;11(12):e6503. doi: 10.7759/cureus.6503.
Congenital anomalies of superior (SVC) and inferior vena cava (IVC) are not uncommon and usually incidentally recognized. The normal embryogenesis is a complex process involving the formation of several anastomoses. Failure of certain vessels to develop or regress results in numerous caval variations and anomalies. Although these are usually without significant clinical implications, awareness of these anomalies is necessary to avoid diagnostic pitfalls and suggest the presence of other abnormalities and for the planning of vascular intervention or surgery. We present a very rare, caval anomaly, a left-sided IVC with hemiazygos continuation to left SVC in the absence of right SVC.
上腔静脉（SVC）和下腔静脉（IVC）的先天性异常并不罕见，通常是偶然发现的。正常的胚胎发生是一个复杂的过程，涉及多个吻合支的形成。某些血管发育或退化失败会导致大量的腔静脉变异和异常。虽然这些通常没有明显的临床意义，但了解这些异常对于避免诊断陷阱、提示其他异常的存在以及规划血管介入或手术是必要的。我们报告一例非常罕见的腔静脉异常，即左侧IVC伴半奇静脉延续至左侧SVC且无右侧SVC。
