Hentges Matthew, Schroeder Karson, Somani Aleesha
General Surgery, Kansas City University, Kansas City, USA.
Cureus. 2024 Aug 27;16(8):e67935. doi: 10.7759/cureus.67935. eCollection 2024 Aug.
A persistent left-sided superior vena cava (PLSVC) is the most common thoracic venous anomaly. However, it is still quite rare in the general population. PLSVC occurs during the embryological stages and is seen mostly in patients with congenital heart disease. Normally during development, the left anterior cardinal vein will regress and obliterate to form the ligament of Marshall. In cases of PLSVC, the left anterior cardinal vein persists and can become a persistent left superior vena cava (SVC). There are different anatomical variants of a left-sided SVC, most commonly presenting with both a right and a left SVC. In some PLSVC cases, there is an isolated left SVC. Though rare, this anomaly is not without clinical significance. This case report describes a 48-year-old male with incidental findings of isolated PLSVC seen on chest X-ray after the placement of a temporary dialysis catheter. This report will also describe the incidence/prevalence, embryological origin including anatomical variants, and clinical implications of PLSVC.
永存左侧上腔静脉（PLSVC）是最常见的胸部静脉异常。然而，在普通人群中它仍然相当罕见。PLSVC发生于胚胎发育阶段，多见于先天性心脏病患者。正常发育过程中，左前主静脉会退化并闭塞，形成马歇尔韧带。在PLSVC病例中，左前主静脉持续存在，并可成为永存左侧上腔静脉（SVC）。左侧SVC存在不同的解剖变异，最常见的是同时存在右侧和左侧SVC。在一些PLSVC病例中，存在孤立的左侧SVC。尽管罕见，但这种异常并非没有临床意义。本病例报告描述了一名48岁男性，在放置临时透析导管后胸部X线检查偶然发现孤立性PLSVC。本报告还将描述PLSVC的发病率/患病率、胚胎起源（包括解剖变异）及临床意义。
