Targeted therapy is able to shrink the lesions. Targeted therapy refers to the treatment modality of targeting already defined cancer-causing sites at the cellular molecular level, which can very effectively block the proliferation of tumor cells. If the tumor is sensitive to the targeted drugs, the size of the tumor will be significantly reduced after treatment. Some tumors can completely disappear after targeted therapy, and the original lesions or metastatic lesions cannot be seen on CT or MRI images. Targeted therapy has accurate positioning and high specificity, mainly interfering with and blocking the proliferation of tumor cells. Targeted therapy only works on tumor cells and has little effect on normal cells, and the adverse effects are less severe than traditional chemotherapy. Different targeted drugs have different targets and indications, and should be used under the guidance of professional doctors.