CTICasesSuperior Vena Cava Aneurysm
Imaging findings
CT chest shows significant, progressive fusiform dilation of the superior vena cava (SVC) in a patient with a history of long-standing indwelling dialysis catheters. Downstream SVC stenosis is present near the right atrial junction.
Key takeaways
True primary SVC aneurysms are extremely rare. Most cases of SVC dilation in adults are acquired, secondary to chronic venous hypertension caused by distal stenosis or occlusion from long-term indwelling central catheters. These pseudoaneurysms or aneurysms carry a risk of thrombosis or rupture.
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