fig2

Figure 2. Seventy-year-old patient with a diagnosis of extraskeletal osteosarcoma of the right thigh. She underwent preoperative radiation and wide local excision. One year later, she developed a soft tissue mass within the subcutaneous gluteal area. This was a biopsy-proven metastatic lesion. Staging studies did not show additional metastatic disease. The decision was made to perform local control with cryoablation. The mass can be seen on (A) T1 and (B) post-contrast imaging prior to cryoablation. Cryoablation was successful (C), and the post-cryoablation results can be seen on (D) T1 and (E) post-contrast imaging. At six months post-procedure, the patient is disease free.