Fig. 1

Pathologically proved clear cell RCC in a 69-year-old man. a Transverse greyscale ultrasound image shows a right renal tumor with cystic and solid components (arrow). b Axial post contrast corticomedullary phase CT image shows the tumor is predominantly cystic (arrow) with internal septations and soft tissue (dashed arrow) which enhances similar to adjacent renal cortex. c Axial T2-weighted MR image shows the cystic (arrow) and heterogeneous solid (dashed arrow) components of the tumor. d Axial post contrast corticomedullary phase T1-weighted MR image shows tumoral enhancement of the solid component (dashed arrow) similar to the adjacent renal cortex