MDL Huntington-CAG Nmbr DNA Anly (HUN)

Department: Molecular Diagnostics
Test Synonym(s): LAB3034, HUN, Huntington Disease, Huntington-CAG Number DNA Analysis
CPT Codes: 81274
Methodology: Direct Detection of CAG Expansion Mutation by PCR and evaluated by capillary electrophoresis; Laboratory Developed Test
Tube Type: Lavender top (EDTA)
Specimen: Whole blood
Alternate Specimen: None
Pediatric Requirements: 2 microtainers
Volume: 1 tube
Minimum Volume: 2 microtainers
Temperature: Room temperature or refrigerated
Stability: Room temperature: 2 days, refrigerated: 7 days
Reasons for Rejection: Client will be notified by Molecular Diagnostics Lab if specimen is rejected.
Days Performed: Once a week - variable days
Times Performed: Batched
TAT: 10 days
Significance: Direct detection of CAG Expansion and Repeat Number
Special Instructions: Genetic counseling must be performed before sending a sample for testing. Call or email the Molecular Diagnostics Laboratory at 615-343-8121 or moleculardiagnosticlab@vumc.org if additional assistance is needed or if the patient has received a transfusion in the prior 2 weeks or has a history of a stem cell transplant.
Click here to print the Molecular Diagnostics requisition.

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