Dynamic Contrast-Enhanced CT Characterization of Xp11.2 Translocation/TFE3 Gene Fusions versus Papillary Renal Cell Carcinomas

Figure 3

Type 2 papillary renal cell carcinoma in a 58-year-old asymptomatic man. (a) Abdominal plain CT scan shows an irregular ill-defined heterogeneous (around 44 HU) mass of 8.3 cm in size in the left kidney. Note a punctate calcification within the lesion. (b) The tumor, which involves both the cortex and medulla, shows heterogeneously moderate enhancement (to around 80 HU) during corticomedullary phase. (c) The tumor’s attenuation remains around 80 HU in the nephrographic phase. The unenhanced areas within the tumor indicate necrosis.

(a)

(b)

(c)