Figure 9a. Renal cell carcinoma in a 43-year-old woman. (a) Unenhanced CT scan reveals a 2-cm-diameter hyperattenuating (70 HU) renal mass (arrow). (b) Contrast-enhanced CT scan shows enhancement of the mass to 96 HU. (c) Photograph of a gross specimen cross section shows a clear cell renal cell carcinoma (arrow) with internal hemorrhage.