Laboratory Medicine Program

Lymphocyte Subset Enumeration
(CD3/CD4/CD8/CD19/CD16/CD56, TBNK, Flow Cytometry)

Clinical Decription:
Relative and absolute counts of major lymphocyte subsets, T cells, B cells and NK cells. T cells and their subsets are enumerated by expression of CD3, CD4 and/or CD8 antigens (report include CD4:CD8 ratio). B cells are enumerated by expression of CD19. NK cells are enumerated by expression of CD16/CD56. These values are commonly used to identify an immunodeficiency state or to monitor the efficacy of treatment in patients with HIV infection or other diseases affecting the immune system.

Method: Flow Cytometry; BD FACS Lyric

Component Tests Used: CD3, CD4, CD8, CD16, CD19, CD56

Reference Ranges Used:
Reference ranges for this test are not available online. However, they are included in all test results. For more information, please call us.

Specimen Type: Peripheral Blood
Volume: 3mL mL (minimum: 3mL mL)

Shipping: Room temperature

Special Instructions: Samples are stable up to 30 hours from the time of collection; requests and collections for testing should be made in alignment with stability and Flow Cytometry laboratory operating hours (business hours). Keep sample at room temperature at all times. Send specimens immediately.

Testing Schedule(s): Please call

Turnaround Time: 2 days

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For more information, call 416.340.5227 or 1.866.865.5227

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