TBBS - Overview: Quantitative Lymphocyte Subsets: T, B, and NK

Test Catalog

Test Name

Test ID: TBBS    
Quantitative Lymphocyte Subsets: T, B, and NK

Useful For Suggests clinical disorders or settings where the test may be helpful

Serial monitoring of CD4 T-cell count in HIV-positive patients


Follow-up and diagnostic evaluation of primary immunodeficiencies, including severe combined immunodeficiency


Immune monitoring following immunosuppressive therapy for transplantation, autoimmunity, and other immunological conditions where such treatment is utilized


Assessment of immune reconstitution post hematopoietic cell transplantation


Early screening of gross quantitative anomalies in lymphocyte subsets in infection or malignancies


Absolute quantitation of circulating B cells for diagnosis of chronic lymphocytic leukemia patients as indicated in the 2008 International Workshop on Chronic Lymphocytic Leukemia guidelines

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

See Newborn Screen Follow-up for Severe Combined Immunodeficiency Syndrome (SCID) in Special Instructions.

Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test

Method Name A short description of the method used to perform the test

Flow Cytometry

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

QN Lymphocyte Subsets: T, B, and NK

Aliases Lists additional common names for a test, as an aid in searching

AIDS (Acquired Immune Deficiency Syndrome)
B Cell
CD19 Count, Flow Cytometry
CD3 Count, Flow Cytometry
CD4 Count, Flow Cytometry
CD56 Count, Flow Cytometry
CD8 Count, Flow Cytometry
Flow Cytometry, T- and B- Cells
Helper Suppressor Ratio
Immune Competence
Immune Status, Flow Cytometry
Immunodeficiency Panel, Flow Cytometry
Immunophenotyping -- CD4 Count, Flow Cytometry
Lymphocyte Surface Marker Assay
Quantitative CD4 and CD8
Suppressor Helper Ratio
T and B Cells
T Cell
T-Helper/T-Suppressor Ratio
T4/T8 Helper Suppressor Ratio
B and T Lymphocyte Surface Marker
T and B Lymphocyte Surface Marker
T and B-Cell Surface Markers: T-Helper/T-Suppressor, Flow Cytometry
Lymphocyte Enumeration
Lymphocyte Subset Enumeration
Severe Combined Immunodeficiency (SCID)
Natural Killer Cells
NK cell quantitation
Total NK cells
QN Lymphocyte Subsets: T, B, and NK