Test guide
Absolute Helper T Lymphocyte Count
The measurement of the number of helper T lymphocytes, which are T lymphocytes that express CD4, in a cubic millimeter of blood. It is calculated by multiplying 1000 by both the total leukocyte count and the percent of helper T cells in the differential leukocyte count.
What it is for
Source: National Cancer Institute, NCI Thesaurus 26.09d, C201183. 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 CD4 Expressing T Cell Count
- Absolute CD4 Expressing T Lymphocyte Count
- Absolute CD4 Positive T Cell Count
- Absolute Helper T Cell Count
- Absolute Helper T Lymphocyte Count
- CD4 Positive T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement
- Helper T Lymphocyte to Total Leukocyte per Cubic Millimeter Measurement
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