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Test Code CEE20 CD20 Cell Expression Evaluation, Varies


Ordering Guidance


This test should not be used as a shortened diagnostic panel. For a complete diagnostic B-cell, T-cell, or acute immunophenotyping panel, order LCMS / Leukemia/Lymphoma Immunophenotyping, Flow Cytometry, Varies.

 

This test evaluates CD20 expression only. For CD52 expression, order CEE52 / CD52 Cell Expression Evaluation, Varies. For CD49d expression, order CEE49 / CD49d Cell Expression Evaluation, Varies.



Shipping Instructions


Specimen must arrive within 4 days of collection.



Necessary Information


The following information is required:

1. The therapeutic monoclonal antibody being used or considered

2. The pertinent hematologic diseases that have been diagnosed or considered

3. Specimen source

4. Date and time of collection



Specimen Required


Submit only 1 of the following specimens:

 

Specimen Type: Whole Blood

Container/Tube:

Preferred: Yellow top (ACD solution A or B)

Acceptable: Lavender top (EDTA) or Green top (sodium heparin)

Specimen Volume: 10 mL

Collection Instructions:

1. Send whole blood specimen in original tube. Do not aliquot.

2. Label specimen as blood.

Specimen Stability Information: Ambient ≤4 days/Refrigerated ≤4 days

 

Specimen Type: Bone marrow

Container/Tube:

Preferred: Yellow top (ACD solution A or B)

Acceptable: Lavender top (EDTA) or green top (sodium heparin)

Specimen Volume: 1 to 5 mL

Collection Instructions:

1. Submission of bilateral specimens is not required.

2. Label specimen as bone marrow.

3. Send bone marrow specimen in original tube. Do not aliquot.

Specimen Stability Information: Ambient/Refrigerated ≤4 days


Forms

If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.

Useful For

Detecting cell-surface antigens on malignant cells that are potential therapeutic antibody targets, specifically CD20

 

Determining the eligibility of patients for monoclonal antibody therapies

 

Monitoring response to the therapeutic antibody

Testing Algorithm

A complete diagnostic B-cell, T-cell, or acute immunophenotyping panel is not performed. In some cases, a limited morphologic evaluation will be performed.

Method Name

Immunophenotyping

Reporting Name

CD20 Cell Expression Evaluation, V

Specimen Type

Varies

Specimen Minimum Volume

Blood: 3 mL
Bone Marrow: 1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Varies 4 days

Reference Values

Normal individuals have B lymphocytes, T lymphocytes, or myeloid cells that express the corresponding cell-surface antigens in question.

Day(s) Performed

Monday through Saturday

Report Available

1 to 4 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed using an analyte specific reagent. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

88184-Flow cytometry; first cell surface, cytoplasmic or nuclear marker

88185 x 3-Flow cytometry; additional cell surface, cytoplasmic or nuclear marker

88187-Flow Cytometry Interpretation, 2 to 8 Markers

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CEE20 CD20 Cell Expression Evaluation, V 100992-7

 

Result ID Test Result Name Result LOINC Value
CK164 CEE20 Result No LOINC Needed
CK165 Final Diagnosis 22637-3