Fig. 4

A 66-year-old female with a pathologically proven papillary RCC (type1). a Longitudinal greyscale ultrasound image shows an exophytic homogeneous tumor (arrow) at the upper pole of the right kidney. b Axial post contrast nephrographic phase CT image shows the tumor (arrow) is homogeneous and hypovascular relative to the renal parenchyma. c Axial T2-weighted MR image shows the characteristic low signal of the tumor (arrow). d Axial post contrast corticomedullary phase T1-weighted MR image shows hypovascular nature of the tumor (arrow)