Radiation therapy for brain tumors uses high-energy radiation to kill cancer cells and shrink tumors.This can be delivered externally through a linear accelerator (external beam radiation therapy) or internally via implanted radioactive seeds (brachytherap...
Radiation therapy (also called radiotherapy) is the use of high-energy rays to damage cancer cells and stop them from growing. Like surgery, radiation therapy is local therapy; it can affect cancer only in the treated area. Radiation is sometimes used befo...
Chemotherapy is the use of drugs to kill cancer cells. Chemotherapy is sometimes given after surgery for colorectal cancer to try to prevent the disease from recurring, or coming back. This additional treatment is called adjuvant therapy. The doctor may us...