Familial Variant, Targeted Testing
Use
Diagnostic or predictive testing for specific conditions when a DNA variant of interest has been previously identified in a family member and follow-up testing for this specific variant in other family members is desired. It is also useful for carrier screening for individuals at risk for having a variant that was previously identified in a family member, segregation analysis for a familial DNA variant, and confirmation of germline status for variants detected via somatic testing.
Special Instructions
A previous bone marrow transplant from an allogenic donor will interfere with testing. For instructions for testing patients who have received a bone marrow transplant, call 800-533-1710. The identification of a specific variant in an affected family member is required before this test can be performed for additional family members. If a familial variant has not been previously identified, call 800-533-1710 to discuss testing options. Testing may be declined at the discretion of the laboratory.
Limitations
Rare allelic variants may be present and could lead to false-negative or false-positive results. This assay does not rule out the presence of other variants within this gene or within other genes that may be associated with the familial condition. Analysis is performed for the familial variants provided only, and does not assess other gene variations. Contact the laboratory with any questions regarding assay performance.
Methodology
PCR-based (PCR)
Biomarkers
LOINC Codes
- 51966-0
- 50397-9
- 82939-0
- 69047-9
- 48767-8
- 31208-2
- 85069-3
- 18771-6
Result Turnaround Time
15-22 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
3 mL
Minimum Volume
1 mL
Container
Lavender top (EDTA)
Collection Instructions
Invert several times to mix blood. Send whole blood specimen in original tube. Do not aliquot.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 4 days |
| Refrigerated | 14 days |
