CTICasesAbsent Right Superior Vena Cava with Left Superior Vena Cava Draining to Coronary Sinus
Imaging findings
MRI demonstrates the congenital absence of the right superior vena cava (SVC), with a persistent left SVC that drains appropriately into the coronary sinus. The plain radiograph does not show a typical SVC shadow on the right, which can be challenging to discern retrospectively.
Key takeaways
Congenital absence of the right SVC with a persistent left SVC is an anatomical variant. MRI is effective in clearly delineating the venous anatomy, explaining unusual findings or lack thereof on plain radiographs. The left SVC typically drains into the coronary sinus.
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