Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.

Synonyms: Lymphocyte, T, Cell, T, T Cells, T-Lymphocytes, Thymus-Dependent Lymphocytes, T Lymphocyte, T-Cell, T-Cells, T Cell, T-Lymphocyte, Lymphocytes, Thymus-Dependent, Cells, T, T Lymphocytes, Thymus Dependent Lymphocytes, Lymphocytes, T, Lymphocyte, Thymus-Dependent, Thymus-Dependent Lymphocyte