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Persistent left superior vena cava (PLSVC) is the most common congenital abnormality of the thoracic systemic venous drainage; in fact, cardiology fellows in training are often quizzed on this when a dilated coronary sinus is noted on an echocardiogram. However, its association with an absent right superior vena cava (RSVC) and how to diagnose this combined condition is less commonly known. We present two cases of PLSVC with an absent RSVC, describe how to recognize and confirm this diagnosis, and discuss its clinical relevance. [ABSTRACT FROM AUTHOR]

Persistent left superior vena cava is the most common congenital venous anomaly of the thoracic venous system, occurring in 0.3% to 0.5% of individuals in the general population. It may remain asymptomatic throughout life and be incidentally found in healthy individuals undergoing vascular procedures such as venous access device placements and endovascular cardiac interventions. Here we present a case of persistent left superior vena cava incidentally realized during chemoport insertion in a patient with breast cancer. [ABSTRACT FROM AUTHOR]

Anomalous left brachiocephalic vein (ALBCV) is a rare condition of the major thoracic veins. It is usually associated with a congenital cardiac anomaly. Most reports on ALBCV are on aberrant left BCV, and there are few reports on double left BCV. Persistent left superior vena cava (PLSVC) is also a rare vascular anomaly that is caused by the failure of the left anterior cardinal vein to regress. To our knowledge, double left BCV with PLSVC has not been reported. Here, we report a case of double left BCV with PLSVC in a 72-year-old male patient with no previous cardiac abnormality. [ABSTRACT FROM AUTHOR]