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HelpTest ID CD40 B-Cell CD40 Expression by Flow Cytometry, Blood
Useful For
Evaluating patients for hyper-IgM type 3 (HIGM3) syndrome due to defects in CD40, typically seen in patients <10 years of age
Assessing B-cell immune competence in other clinical contexts, including autoimmunity, malignancy and transplantation
Method Name
Flow Cytometry
Reporting Name
CD40 by Flow, QL, BSpecimen Type
Whole Blood EDTAShipping Instructions
It is recommended that specimens arrive within 24 hours of draw.
Samples arriving on the weekend and observed holidays may be canceled.
Necessary Information
Ordering physician name and phone number are required.
Specimen Required
For serial monitoring, we recommend that specimen draws be performed at the same time of day.
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions: Send specimen in original tube. Do not aliquot.
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood EDTA | Ambient | 72 hours | PURPLE OR PINK TOP/EDTA |
Reference Values
Present (normal)
Day(s) Performed
Monday through Friday
Specimens are required to be received in the lab weekdays and by 4 p.m. on Friday. No weekend processing.
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
88184
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| CD40 | CD40 by Flow, QL, B | In Process |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 89009 | CD40 by Flow, QL, B | In Process |