Figure 1.

Computed tomography findings for a 25-year-old man. The red arrow indicates a large heterogeneous mass arising from the left kidney replacing the left renal parenchyma. The green arrow indicates an exophytic lesion arising from the lower pole of the left kidney, which measures 8 cm. The gold arrow indicates extensive thrombus within the left renal vein, which extends up to the intrahepatic inferior vena cava. The yellow arrow indicates a rounded hepatic mass compatible with metastasis measuring up to 3 cm.