Figure 2

Coronal reformatted computed tomography image of the initial contrast enhanced abdominal scan shows a renal mass located in the lower pole of the left kidney, appearing inhomogeneous, predominantly less enhancing compared to the normal renal parenchyma (A). Histologically and immunohistochemically examinations of the partial nephrectomy show a tumor similar to the lymph node infiltration with an increased proliferation (B: H&E, x100 / C: Ki67 immunostaining, x100).