Although metastatic disease indicates diffusion of a cancer at a distance from its site of origin, in some cases pulmonary and hepatic metastases are isolated and slowly progressive, making them suitable for local treatment. Thermo-ablation techniques are associated with low morbidity and reduced collateral parenchymal damage; they therefore play an important role in such patients, where the disease is slow and chronic, requiring repeated local treatments. Unlike radiotherapy, a second treatment is possible in the event of local failure.