Renal Sinus Fat Invasion and Tumoral Thrombosis of the Inferior Vena Cava-Renal Vein: Only Confined to Renal Cell Carcinoma

Figure 4

(a, b) Axial venous phase postcontrast CT images (a, b) from the mid-portion of the kidneys. There is a hypoattenuating mass lesion involving the right central part of the kidney with sinus extension (arrows). Hypodense thrombus materials are seen in both right renal vein and inferior vena cava (arrowheads).

(a)

(b)