Test Catalog

Test ID: RBCS    
Relative B-Cell Subset Analysis Percentage, Blood

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

Screening for humoral or combined immunodeficiencies, including common variable immunodeficiency (CVID), hyper IgM syndrome, among others, where B-cell subset distribution information is desired


Assessing B-cell subset reconstitution after hematopoietic cell (HCT) or bone marrow transplant


Assessing B-cell subset reconstitution following recovery of B cells after B-cell-depleting immunotherapy

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests.

Test IDReporting NameAvailable SeparatelyAlways Performed
CVIDCVID Confirmation Flow PanelYesNo

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

This test should be ordered only when percentages (relative distribution of B cell subsets within the total B-cell population) are needed for the reportable B-cell subsets. If both percentages and absolute counts are needed for the reportable B-cell subsets, order IABCS / B-Cell Phenotyping Profile for Immunodeficiency and Immune Competence Assessment, Blood.

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

Fluorescent Flow Cytometry

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


Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Relative B Cell Subset Analysis %

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

B Cell
B Cell Assessment
B Cell Immunodeficiency
B Cell Phenotype
B Cell Phenotyping
B Cell Subset
B-cell Assessment
B-cell CVID
Common Variable Immunodeficiency
Humoral Immunodeficiency
IgM Memory B-cell
Immune Reconstitution
Kidney Transplant
Mature B-cell
Memory B-cell
Transitional B-cell