CTICasesRenal Cell Carcinoma Tumor Embolism
Imaging findings
CT angiogram shows a large filling defect in the inferior vena cava extending from a renal cell carcinoma, along with tumor emboli in the pulmonary arteries. The emboli show heterogeneous enhancement and internal vascularity, confirmed on PET CT.
Key takeaways
Renal cell carcinoma classically invades the renal vein and IVC. Macroscopic tumor embolization to the pulmonary arteries can mimic thromboembolic disease, but can be distinguished by internal neovascularity (often supplied by bronchial arteries) and FDG-avidity.
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