fig1

Figure 1. 63-year-old female with stage IV renal cell carcinoma. (A) Axial CT image through the pelvis shows a large destructive lytic metastasis involving the posterior aspect of the left hip resulting in severe pain (circle). (B) Axial CT image during cryoablation of the left hip metastasis for pain palliation shows one of multiple cryoablation probes inserted into the lesion using a posterior approach (arrow). The ovoid low attenuation ablation zone is visible (arrowheads) and covers the bone-tumor interface.