Difference between chemotherapy and radiotherapy

Cancer treatment methods include surgery, radiotherapy, chemotherapy, immunotherapy and targeted therapy. Chemotherapy and radiotherapy are important means of cancer treatment, chemotherapy and radiotherapy are different. Chemotherapy is the use of cytotoxic drugs to inhibit the DNA of tumor cells, so play a role in killing tumor cells. Chemotherapy is a drug therapy, and it is a systemic treatment. Radiotherapy is the use of high-energy x-rays and other rays generated by radiotherapy equipment such as linear accelerators to locally irradiate tumors, so it plays a role in controlling tumors. Radiotherapy is the use of radiation therapy, radiotherapy is a local treatment, this is the biggest difference between the two.