Test guide
Absolute T Lymphocyte Count
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.
What it is for
Source: National Cancer Institute, NCI Thesaurus 26.09d, C201181. Unmodified NCI definition, CC BY 4.0. Source identity and classification checked automatically on 2026-10-20.
Limitations
Terminology reference for a laboratory procedure. The source definition does not establish routine clinical availability, validated specimen types, reference intervals, product authorization or suitability for an individual. Consult the performing laboratory for its validated method and interpretation.
Also known as
- Absolute CD3 Expressing T Cell Count
- Absolute CD3 Expressing T Lymphocyte Count
- Absolute CD3 Positive T Cell Count
- Absolute T Lymphocyte Count
- T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement
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