PMC2224897_01
CT reconstruction of the abdomen and pelvis demonstrate a large soft-tissue mass arising from the right ilium (*) and with an adjacent thrombus in the inferior vena cava (arrow). Note the IVC filter at the level of the renal vein (superior to the thrombus).
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F1
Computerized tomography (CT) demonstrated enlargement of the soft-tissue mass and with an adjacent thrombus of the right common iliac vein and inferior vena cava (Fig. 1). 
Following hemipelvectomy, the gross specimen demonstrated tumor invasion into the common iliac vein and inferior vena cava (arrow).
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F2
Gross examination of the specimen revealed direct tumor invasion through the right common iliac vein (Fig. 2).