The main purpose of tumor ablation is to completely inactivate the local lesions of tumors, but for very large tumors, it is possible to achieve most of the inactivation or to reduce the tumor load in one treatment. However, for very large tumors, it is possible to achieve most of the inactivation or reduce the tumor load in one treatment. Therefore, after the local ablation treatment, the tumor can be radically treated locally, and the effect can be comparable to surgical resection.