Figure 2.

A 67-year-old man with a 34 mm renal cell carcinoma in the left kidney. Axial contrast-enhanced CT (a) demonstrates a heterogeneously enhancing mass (arrow). RF ablation was performed with multitined expandable electrods (b), but post-procedural contrast-enhanced CT revealed areas of enhancement in the mass (arrow) compatible with residual disease (c). A second target positioning was performed to achieve a complete ablation (d). Post-procedural CT shows no enhancement of the ablated lesion and a small hematoma (arrow, (e)). Follow-up CT after 4 weeks revealed no evidence of residual or recurrent disease (arrow) and partial reabsorption of the hematoma (f).