NCI Dictionary of Cancer Terms

The NCI Dictionary of Cancer Terms features 8,442 terms related to cancer and medicine.

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investigational group
(in-VES-tih-GAY-shuh-nul groop)
The group in a clinical research study that receives the drug, vaccine, or other intervention being tested. Interventions may also include medical procedures (such as radiation therapy and surgery), medical devices, behavior changes (such as diet and exercise), education programs, and counseling. Also called experimental group and intervention group.