Fig. 3

CT images of the 37-year-old male, five months later after radical mass excision. A Contrast-enhanced abdominal CT scan shows multiple irregular nodules and masses in abdominal cavity and retroperitoneal spaces. Tumor embolus was distinct in postcava (red arrows in A and B). B It is observed that reappeared mass grows into the perirenal spaces and blocks ureters on both sides, which give rise to pelvicalyceal dilatation and hydronephrosis (yellow arrows). C Chest CT scan demonstrates a huge well-defined mass appears adjacent to the right-side pulmonary hilum