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Demonstration of renal arterial anatomy and tumour neovascularity for vascular mapping of renal cell carcinoma: the value of CO₂ angiography

Department of Radiology, St George's Hospital, Blackshaw Road, London SW17 0QT, UK

View larger version (99K): [in a new window]   Figure 1. (a) 74-year-old man with 4 cm left renal mass. Digitally subtracted selective left renal angiogram (CO2) demonstrates the divisional and segmental arteries. Fragmentation of the CO2 bolus prevents visualization of the corticomedullary and tumoral vessels. (b) The mass and feeding vessels are clearly demonstrated using iodinated contrast medium.

View larger version (160K): [in a new window]   Figure 2. (a–c) 56-year-old lady with a 1.3 cm left renal mass. Digitally subtracted selective left renal angiogram (CO2) demonstrates poor opacification of the intrarenal vessels through all phases of the acquisition. No tumour blush is seen. (d) The corresponding study using iodinated contrast demonstrates all intrarenal vascular divisions as well as capsular vessels, which may be contributing to tumour supply. However, the tumour is not easily visualized.