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HelpTest Code CD40 B-Cell CD40 Expression by Flow Cytometry, Blood
Reporting Name
CD40 by Flow, QL, BUseful 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
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen 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 |
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
Reference Values
Present (normal)
Day(s) and Time(s) Performed
Monday through Friday
Do not send specimen after Thursday. Specimen must be received by 10 a.m. on Friday.
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 U.S. Food and Drug Administration.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 |