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HelpTest ID BCLGP B-Cell Deficiency Primary Immunodeficiency Disorder Panel (34 genes), Next-Generation Sequencing, Varies
Test Down Notes
This test is currently unavailable. As an alternate, order ZW242, 2011156. For additional details, see test update here. Contact Laboratory Resource Coordinators with questions.
Ordering Guidance
The genes on this panel are primarily associated with B cell defects. If suspecting or considering a combined immunodeficiency involving T cells and other cellular defects, or EBV-related primary immunodeficiencies, order SCDGP / Severe Combined Immunodeficiency Panel (63 genes), Next-Generation Sequencing, Varies. SCDGP includes the RAG1, RAG2, IKBKG genes among others that have a combined T and B cell immunodeficiency phenotype.
Targeted testing for familial variants (also called site-specific or known mutations testing) is available for the genes on this panel. See FMTT / Familial Mutation, Targeted Testing, Varies.
Necessary Information
1. Primary Immunodeficiencies Patient Information (T791) is strongly recommended, but not required, to be filled out and sent with the specimen. This information aids in providing a more thorough interpretation of test results. Ordering providers are strongly encouraged to complete the form and send it with the specimen.
2. Include physician name and phone number with specimen.
Specimen Required
Due to lower concentration of DNA yielded from alternate specimen sources, _PMS2 cannot be performed on any specimen type other than whole blood or DNA extracted from whole blood.
Patient Preparation: A previous bone marrow transplant from an allogenic donor will interfere with testing. Call 800-533-1710 for instructions for testing patients who have received a bone marrow transplant.
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Whole blood
Container/Tube: Lavender top (EDTA)
Specimen Volume: 3 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send whole blood specimen in original tube. Do not aliquot.
Specimen Stability Information: Ambient (preferred) 4 days/Refrigerated 14 days
Specimen Type: Blood spot
Supplies: Card-Blood Spot Collection Filter Paper (T493)
Container/Tube:
Preferred: Collection card (Whatman Protein Saver 903 Paper)
Acceptable: Whatman FTA Classic paper, PerkinElmer 226 (formerly Ahlstrom 226) filter paper, or blood spot collection card
Specimen Volume: 2 to 5 Blood spots
Collection Instructions:
1. An alternative blood collection option for a patient 1 year of age or older is a fingerstick. See How to Collect Dried Blood Spot Samples via fingerstick.
2. Let blood dry on the filter paper at ambient temperature in a horizontal position for a minimum of 3 hours.
3. Do not expose specimen to heat or direct sunlight.
4. Do not stack wet specimens.
5. Keep specimen dry.
Specimen Stability Information: Ambient (preferred)/Refrigerated
Additional Information:
1. Due to lower concentration of DNA yielded from blood spots, it is possible that additional specimen may be required to complete testing.
2. For collection instructions, see Blood Spot Collection Instructions.
3. For collection instructions in Spanish, see Blood Spot Collection Card-Spanish Instructions (T777).
4. For collection instructions in Chinese, see Blood Spot Collection Card-Chinese Instructions (T800).
Specimen Type: Peripheral blood mononuclear cells (PBMC)
Container/Tube: Cell pellet
Collection Instructions: Send as a suspension in freezing medium or cell pellet frozen on dry ice.
Specimen Stability Information: Frozen
Specimen Type: Cultured fibroblasts
Container/Tube: T-75 or T-25 flask
Specimen Volume: 1 Full T-75 or 2 full T-25 flasks
Specimen Stability Information: Ambient (preferred)/Refrigerated <24 hours
Additional Information: Indicate the tests to be performed on the fibroblast culture cells. A separate culture charge will be assessed under CULFB / Fibroblast Culture for Biochemical or Molecular Testing. An additional 3 to 4 weeks is required to culture fibroblasts before genetic testing can occur.
Specimen Type: Skin biopsy
Supplies: Fibroblast Biopsy Transport Media (T115)
Container/Tube: Sterile container with any standard cell culture media (eg, minimal essential media, RPMI 1640). The solution should be supplemented with 1% penicillin and streptomycin. Tubes of culture media can be supplied upon request (Eagle's minimum essential medium with 1% penicillin and streptomycin).
Specimen Volume: 4-mm punch
Specimen Stability Information: Refrigerated (preferred)/Ambient
Additional Information: A separate culture charge will be assessed under CULFB / Fibroblast Culture for Biochemical or Molecular Testing. An additional 3 to 4 weeks is required to culture fibroblasts before genetic testing can occur.
Specimen Type: Extracted DNA
Container/Tube: 2 mL screw top tube
Specimen Volume: 100 mcL (microliters)
Collection Instructions:
1. The preferred volume is 100 mcL at a concentration of 250 ng/mcL
2. Include concentration and volume on tube.
Specimen Stability Information: Frozen (preferred)/Ambient/Refrigerated
Forms
1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
-Informed Consent for Genetic Testing (T576)
-Informed Consent for Genetic Testing-Spanish (T826)
2. Primary Immunodeficiencies Patient Information (T791) in Special Instructions
Useful For
Providing a comprehensive genetic evaluation for patients with a personal or family history suggestive of primary B-cell deficiencies and related disorders
Patients with B-cell immunodeficiency disorders who may have other clinical presentations, besides the humoral immune defect, such as inflammatory bowel disease, autoimmunity, or other as indicated above
Establishing a diagnosis of a B-cell deficiency or related disorder, in some cases, allowing for appropriate management and surveillance for disease features based on the gene involved
Identifying variants within genes known to be associated with increased risk for disease features allowing for predictive testing of at-risk family members
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| _PMS2 | PGL_PMS2C (Bill Only) | No | No |
| CULFB | Fibroblast Culture for Genetic Test | Yes | No |
Testing Algorithm
When clinical history of defective immunoglobulin class switching is provided, PMS2 gene analysis will be performed on whole blood or DNA submitted samples only via Sanger sequencing and multiplex ligation-dependent probe amplification at an additional charge.
Due to lower concentration of DNA yielded from alternate specimen sources, _PMS2 cannot be performed on any sample type other than whole blood or DNA extracted from whole blood.
For skin biopsy or cultured fibroblast specimens, fibroblast culture testing will be performed at an additional charge. If viable cells are not obtained, the client will be notified.
Special Instructions
Method Name
Custom Sequence Capture and Targeted Next-Generation Sequencing followed by Polymerase Chain Reaction (PCR) and Supplemental Sanger Sequencing
Reporting Name
B-cell Deficiency PID Gene PanelSpecimen Type
VariesSpecimen Minimum Volume
Whole blood: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Varies | ||
Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday
Report Available
28 to 56 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed, and its performance characteristics 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
81443
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| BCLGP | B-cell Deficiency PID Gene Panel | 97565-6 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| BA3886 | Gene(s) Evaluated | 48018-6 |
| BA3887 | Result Summary | 50397-9 |
| BA3888 | Result Details | 82939-0 |
| BA3889 | Interpretation | 69047-9 |
| BA3890 | Additional Information | 48767-8 |
| BA3891 | Method | 85069-3 |
| BA3892 | Disclaimer | 62364-5 |
| BA3893 | Reviewed by | 18771-6 |