T (Thymus Derived) Lymphocyte Count
Alternate Names : CD3 Count, CD4 Count, T Cell Counts, T-Lymphocyte Count
Definition A test that measures the amount of T-lymphocytes (a type of white blood cell) in the blood.
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Why is the Test Performed?
A count of the T cells may be helpful in the diagnosis of immunodeficiency diseases and lymphocytic diseases. It is also used to monitor the response to therapy for these type of diseases.
Lymphocytes are white blood cells that are part of the immune system. T lymphocytes (T-cells) act directly (cellular immunity) to fight diseases or organisms, stimulate B lymphocytes (helper T-cells), or suppress some B lymphocyte functions (suppressor T-cells).
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