CTICasesBilateral superior vena cavae
Imaging findings
Contrast-enhanced CT chest shows bilateral superior vena cavae, where the right superior vena cava drains into the left atrium and the left superior vena cava drains into the coronary sinus and right atrium, associated with a low-lying sinus venosus atrial septal defect and partial anomalous pulmonary venous return.
Key takeaways
Bilateral superior vena cavae is a rare congenital systemic venous anomaly. In the transposed configuration, venous blood from one side is shunted directly to the left atrium, which can be associated with a sinus venosus atrial septal defect and partial anomalous pulmonary venous return.
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