Test guide

Cytotoxic T Lymphocyte to Total Blood Cell Percent Measurement

The measurement of the ratio of cytotoxic T lymphocytes, which are T lymphocytes that express CD8, to the total number of blood cells in a sample expressed as a percent value.

For professionalsReviewed 2026-10-20

What it is for

Source: National Cancer Institute, NCI Thesaurus 26.09d, C201184. 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

  • CD8 Expressing T Cell to Total Blood Cell Percent Measurement
  • CD8 Expressing T Lymphocyte to Total Blood Cell Percent Measurement
  • CD8 Positive T Cell to Total Blood Cell Percent Measurement
  • Cytotoxic T Cell to Total Blood Cell Percent Measurement
  • Cytotoxic T Lymphocyte to Total Blood Cell Percent Measurement

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