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Hemiplegic Migraine Sequencing Evaluation
Test Code94551
CPT Codes
81185, 81406, 81407<br /> Limited Access Code
Physician Attestation of Informed Consent
This germline genetic test requires physician attestation that patient consent has been received if ordering medical facility is located in AK, DE, FL, GA, IA, MA, MN, NV, NJ, NY, OR, SD or VT or test is performed in MA.
Includes
CACNA1A, ATP1A2, SCN1A
Preferred Specimen
8 mL whole blood collected in each of two EDTA (lavender-top) tubes, or
Pediatric 0-3 years: 2 mL whole blood
Pediatric 0-3 years: 2 mL whole blood
Minimum Volume
6 mL • 1 mL pediatric
Instructions
Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form.
Higher blood volumes ensure adequate DNA quantity, which varies with WBC, specimen condition, and need for confirmatory testing. Patients, 0-3 years have higher WBC, yielding more DNA per mL of blood.
Higher blood volumes ensure adequate DNA quantity, which varies with WBC, specimen condition, and need for confirmatory testing. Patients, 0-3 years have higher WBC, yielding more DNA per mL of blood.
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 10 days
Refrigerated: 10 days
Frozen: Unacceptable
Refrigerated: 10 days
Frozen: Unacceptable
Methodology
Next Generation Sequencing
Setup Schedule
Set up: As needed; Report available: 28-35 days
Reference Range
See Laboratory Report
Clinical Significance
Detects sequence variants in the CACNA1A, ATP1A2 and SCN1A genes in patients with migraine, migraine with aura, reversible hemiparesis, atypical migraine, and family history of migraine, seizures.