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NCI Dictionary of Cancer Terms


T-regulatory cell  listen  (T-REH-gyoo-luh-TOR-ee sel)

  A type of immune cell that blocks the actions of some other types of lymphocytes, to keep the immune system from becoming over-active. T-regulatory cells are being studied in the treatment of cancer. A T-regulatory cell is a type of white blood cell and a type of lymphocyte. Also called regulatory T cell, suppressor T cell, and T reg.