Comuted tomography (CT) and magnetic resonance imaging (MRI) of the tumors. Left lower pole renal tumor (indicated by arrows) and 5x4x7.5 cm interaortocaval tumor containing fatty tissue, calcification and soft tissue components (indicated by filled arrowheads). The inferior vena cava is compressed by the ineraortocaval tumor (indicated by open arrowhead). (A) Contrast-enhanced CT, parenchymal phase. Wash-out of the contrast is typical for clear cell RCC. Coronal (B) and axial (C) contrast-enhanced MRI.