Figure 10b. Microwave ablation of metastatic pulmonary lesions in a 15-year-old girl with a history of recurrent rhabdomyosarcoma and lung metastases, in whom systemic chemotherapy had previously failed. (a) Preprocedure CT scan shows a right upper lobe metastatic lesion measuring 4.2 cm in greatest diameter. (b) CT scan shows three single 14.5-gauge microwave antennae, which were positioned with fluoroscopic guidance into the center of the lesion. One 10-minute 45-W ablation was performed. The patient suffered a pneumothorax with an air leak that required chest tube insertion and hospitalization for 4 days. (c–f) Contrast-enhanced CT scans obtained at 1-month follow-up show cavitation and no enhancement in the lesion and persistent tracks from the microwave antennae (arrow). Microwave ablation technology enables the use of multiple antennae in the treatment of pulmonary metastatic disease.