A doctor who specializes in using radiation to treat cancer.
External radiation is the use of a machine to aim high- energy rays at the cancer.
Internal radiation therapy is the placement of radioactive material inside the body as close as possible to the cancer. The process by which patients in a clinical trial are randomly assigned to different treatments. Randomization minimizes the differences among groups by equally distributing people with particular characteristics among all the trial arms. A trial in which the participants are randomly assigned to receive one of the treatments under study or a placebo. A general term applied to any eruption of the skin, especially those pertaining to communicable diseases.