Absolute T Lymphocyte Count

**Semantic type:** Laboratory Procedure

**Definition:** The measurement of the number T lymphocytes, which are leukocytes that express CD3, in a cubic millimeter of blood. It is calculated by multiplying 1000 by both the total leukocyte count and the percent of T cells in the differential leukocyte count.

**Synonyms:** - Absolute CD3 Expressing T Cell Count - Absolute CD3 Expressing T Lymphocyte Count - Absolute CD3 Positive T Cell Count - Absolute CD3+ T Cell Count - Absolute CD3+ T Cells - T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement