CTICasesIsolated Left-Sided Superior Vena Cava
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Imaging findings
Chest CT reveals an isolated left-sided superior vena cava (SVC) draining via a dilated coronary sinus into the right atrium. There is a complete absence of a right-sided superior vena cava.
Key takeaways
An isolated left-sided superior vena cava is a rare congenital vascular anomaly resulting from the failure of the left anterior cardinal vein to regress. It typically drains into the right atrium via a dilated coronary sinus and is often asymptomatic, though it can be associated with other congenital cardiac anomalies and can complicate central venous access.
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