Figure 2: Image studies of a renal mass. (a) A hyperechoic left renal tumor (arrow) in a 61-year-old man. (b) Abdominal computed tomography scan without contrast revealed a hyperdensity renal mass. (c) The tumor was not enhanced on computed tomography scan. (d) Coronal view of the abdominal computed tomography demonstrated the renal mass. (e) Robotic-assisted laparoscopic partial nephrectomy was performed, and the pathology is papillary renal cell carcinoma