Double-Positive T-Lymphocyte Count

**Semantic type:** Laboratory Procedure

**Definition:** The determination of the number of double-negative T-lymphocytes (T-lymphocyte that are both CD4+ and CD8+) in a sample.

**Synonyms:** - T-Lymphocytes Double Positive - TDP - TLym DP - TLym Dbl Pos - TLym Dbl Pos