Radiation therapy is a treatment done with technology that realeses energy rayes on the specifc cancerous cells to get ride of them,  and is also used to shrink tumors. In additon to radiation therapy, chemotheropy is another common treatment and this treatment is done by the use of medicated drugs that are used to stop the cancerous cells from splitting into two and quickly dividing. Since cancer cells divide much more ofter then normal cells, they are more likely to be killed by Chemotheropy.