Figure 4. (a) Papillary renal cell carcinoma. Contrast-enhanced CT scan during the corticomedullary phase shows a left renal hypoattenuating solid mass (arrow) with foci of calcification (arrowhead). (b) Papillary renal cell carcinoma. Coronal gadolinium-enhanced T1 weighted Gradient echo MRI shows a uniform, hypovascular solid mass (arrow) in the upper pole of the left kidney.