CTICasesHemi-azygous Continuation of the IVC
Imaging findings
CT chest and abdomen demonstrate absence of the infrahepatic segment of the inferior vena cava (IVC) with continuation via a dilated hemiazygos vein. The hemiazygos vein drains into a persistent left superior vena cava (SVC), which then empties into the coronary sinus.
Key takeaways
Hemiazygos continuation of the IVC is a rare vascular anomaly that can occur in isolation without associated congenital heart disease. It should not be mistaken for a retroperitoneal or mediastinal mass on imaging.
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