Long-term central venous catheterization via persistent left superior vena cava: a case report.

We report a case of a cancer patient who displayed a persistent left superior vena cava (PLSVC) after implantation of a central venous catheter (Port-a-Cath), as revealed by angiography. This anomaly is rather rare (0.3% of healthy individuals), and the few studies on the long-term maintenance of an implant in situ are not very informative.