Incidental Identification of a Persistent Left Superior Vena Cava During Central Venous Catheterization: A Case Report.

A rare vascular condition called persistent left superior vena cava (PLSVC) is frequently found incidentally when performing central venous catheterization (CVC). We report the case of a 57-year-old man, whose left-sided central line seemed to be incorrectly positioned on a chest X-ray with no associated anomalies; further imaging confirmed the presence of a PLSVC, which drained into the coronary sinus. It is important to recognize this variant in order to prevent diagnostic confusion and complications. PLSVC is typically asymptomatic, but PLSVC poses risks during invasive cardiac treatments. For safe clinical practice, it is crucial to be aware of this anatomical variation.