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HelpTest ID LBOR0123 Fragile X CGG Repeat Expansion Analysis
Specimen Type/Requirements
Purple top (EDTA) tube - Whole Blood
Note: For sources other than whole blood - please refer to test code LBOR0152
Blood samples will not be accepted for patients that have undergone an allogenic transplant (e.g. bone marrow or peripheral stem cell) OR that have a history of chronic lymphocytic leukemia (CLL).
Transfusion patients: Wait at least 2 weeks after a packed cell/platelet transfusion, and at least 4 weeks after a whole blood transfusion prior to blood draw for testing.
Chemotherapy patients: DNA quality may be affected if patient has received chemotherapy within the last 120 days. Clients will be contacted to provide additional specimen if DNA quality is insufficient.
Test is not affected by hemolysis or lipemia.
Specimen Volume
| Preferred Volume | 4.0 mL |
|---|---|
| Minimum Volume | 2.0 mL |
Stability/Transport
| Room Temperature | 24 hours | |
|---|---|---|
| Refrigerated | 72 hours | Preferred for transport |
| Frozen | Not Acceptable |
Performed Test Frequency
Monday - Friday
Analytic Time
7 - 10 days
Methodology
Polymerase Chain Reaction (PCR)-Based Assay
Performing Lab
Sanford Molecular Genetics Laboratory - Sioux Falls
CPT
81243
81244 (when indicated for follow up analysis)
Coverage Limitations
This test has limited coverage – If applicable, please submit:
Fragile X Commercial Insurance Patient Waiver of Liability