Absolute Cytotoxic T Lymphocyte Count

**Semantic type:** Laboratory Procedure

**Definition:** The measurement of the number of cytotoxic T lymphocytes, which are T lymphocytes that express CD8, in a cubic millimeter of blood. It is calculated by multiplying 1000 by both the total leukocyte count and the percent of cytotoxic T cells in the differential leukocyte count.

**Synonyms:** - Absolute CD8 Expressing T Cell Count - Absolute CD8 Expressing T Lymphocyte Count - Absolute CD8 Positive T Cell Count - Absolute CD8+ T Cell Count - Absolute CD8+ T Cells - Absolute Cytotoxic T Cell Count - CD8 Positive T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement - Cytotoxic T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement