Cancer cells have the possibility of being completely cleared. In recent years, cancer treatment has been a hot topic and there are various treatment methods for cancer, including surgery, radiation therapy, chemotherapy, immunotherapy, targeted therapy and endocrine therapy. Different stages and different types of tumors choose different treatment plans. Generally, early malignant tumors can be cleared of cancer cells through complete surgical resection. Some tumors with metastasis can be removed by surgery to remove the primary foci and part of metastatic foci, and then according to the type of tumor and then using several other treatment modalities introduced above for comprehensive treatment, some malignant tumors can reach the goal of cancer cell clearance. It should be noted that cancer, as a malignant disease, has the possibility of recurrence. It is recommended that patients should go to regular hospitals for review regularly after cure.