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Beaumont Laboratory

Sézary Cell Panel by Flow Cytometry



Complete Blood Count (CBC) and Differential (CBCD) is required for Sézary cell enumeration, upon detection of a Sézary cell population.

Specimen Collection Criteria

Collect: One Lavender-top EDTA tube for Sézary Cell Panel  AND one Lavender-top EDTA tube for Complete Blood Count with Differential. (Minimum: 2.0 mL each tube.)

  • The second Lavender-top EDTA tube at room temperature is not required for Sézary Cell Panel if:
    • CBCD is ordered for purpose not related to this test and drawn at the same time.
    • CBCD is performed in the Outreach Client's office and results are faxed to the Flow Cytometry Laboratory (248-551-1262) and received at the time of testing.
  • If a positive Sezary population is detected and a separate specimen is NOT submitted for the Complete Blood Count with Differential, a CBCD will be ordered.
  • A copy of the requisition must be sent with the specimen. 

Physician Office/Drawsite Specimen Preparation

Maintain whole blood at room temperature (20-26°C or 68-78.8°F) prior to transport. Specimens must be received in the Laboratory within 48 hours of collection.

Preparation for Courier Transport

Transport: Whole blood, at room temperature (20-25°C or 68-77°F).

Rejection Criteria

  • Clotted tubes are acceptable with the approval of the Flow Cytometry Laboratory supervisor or pathologist on service. Clotted CBC and Differential specimens cannot be run.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 48 hours
Refrigerated (2-8°C or 36-46°F): Only acceptable with the approval of the Flow Cytometry Laboratory supervisor or pathologist on service.
Frozen (-20°C/-4°F or below): Unacceptable

Specimen Storage in Department Prior to Disposal:

Refrigerated (2-8°C or 36-46°F): 7 days


Royal Oak Flow Cytometry Laboratory.


Monday - Saturday.
Results available in 1-2 days.

Reference Range

Pathologist's interpretation will state normal or abnormal antigenic expression.

Test Methodology

Immunophenotyping by Multiparameter 10 Color Flow Cytometry.


Sézary cells are identified by flow cytometry based on presence of aberrant T-cell antigen expression, alteration of CD4:CD8 ratio, and restricted T-cell receptor V-beta usage.

Reflex Testing

If immunophenotypically abnormal T-cells were detected, T-cell receptor V-beta usage may be added to further evaluate the clonality.

Clinical Utility

Sezary Cell panel can be used to confirm or rule out if there is a Sézary cell syndrome in patients with mycosis fungoides. Presence of Sézary cell syndrome is associated with poor prognosis. The same panel may be used to evaluate T-cell lymphoproliferative disorder.

Clinical Disease

T-cell lymphoma, mycosis fungoides.

CPT Code

88184 x 1, 88185 x 13; Interpretation 88188 - 9-15 markers.

Test Codes


Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.