Patient preoperative imaging revealing the renal mass (white arrows). (a) Sagittal ultrasound image of the echogenic, solid renal mass measuring 1.75 cm by 1.96 cm. (b, c) Axial CT images with contrast highlighting the posterior location of the mass, its enhancing posterior wall, and nearness to the collecting system. (d) Coronal CT image of the same mass and its upper pole location. No calcifications were noted throughout the mass.