... THAYR-uh-pee): The use of high-energy radiation from x-rays,gamma rays, neutrons, protons, and other sources to kill cancer cells and shrink tumors.Radical nephrectomy (RA-dih-kul neh-FREK-toh-mee): ... and tissues under amicroscope.Radiation oncologist (RAY-dee-AY-shun on-KAH-loh-jist): A doctor who specializes in using radiation to treat cancer.Radiation therapy (RAY-dee-AY-shun THAYR-uh-pee): ... (BY-oh-LAH-jih-kul THAYR-uh-pee): Treatment to boost or restore the ability of theimmune system to fight cancer, infections, and other diseases. Also called immunotherapy.Biopsy (BY-op-see):...