It is commonly prescribed to patients whose cancer is not localized but has instead likely metastasized or spread to various parts of the body. Chemotherapy can be used to reduce symptoms and pain associated with cancer and to slow the growth of cancerous tumors. In some circumstances, chemotherapy can even kill growing cancer cells. Radiotherapy is a cancer treatment method that uses radiation energy. Radiation is more commonly used to treat localized tumors than cancer that has spread throughout the body. The goal of radiotherapy is to kill tumor cells or at least limit their ability to grow and divide by damaging their genetic material. Like chemotherapy, radiation therapy is not perfectly precise in targeting cancer cells, and even some normal, healthy cells can be damaged. There is also a surgery that surgeons specialize in tumors