.

Vanderbilt Pathology Laboratory Services

Test Directory



METHYLENETETRAHYDROFOLATE REDUCTASE (HHC)

Department: Molecular Diagnostics
Test Synonym(s): MTHFR, HHC, Hyperhomocysteinemia, C677T, A1298C
Test Components: C677T and A1298C mutations
CPT Codes: 81291
Methodology: Direct Detection of Mutation C677T and A1298C (Invader Technology)
Tube Type: Lavender top (EDTA)
Specimen: Whole blood
Alternate Specimen: None
Pediatric Requirements: 0.5 mL whole blood
Volume: 4 mL whole blood
Minimum Volume: 0.5 mL whole blood
Temperature: Room temperature or refrigerated
Stability: Room temperature: 2 days Refrigerated: 3 days
Reasons for Rejection: Client will be notified by Molecular Genetics Lab if specimen is rejected.
Days Performed: Friday
Times Performed: Batched
TAT: 7 - 10 days
Significance: Direct Detection of Variants C677T and A1298C
Special Instructions: Call the Molecular Genetics Laboratory at 615-343-8121, if additional assistance is needed regarding specimen requirements or submission. Please notify Molecular Genetics Laboratory if patient has received a transfusion in the prior 2 weeks. Click here to print the Molecular Diagnostics requisition.

Search Tests

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Enter Keyword:

Search Help


Search Options for the Test Directory:

1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)

2. Enter the Vanderbilt Test Code, if known.

3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.

If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail emily.k.thompson@vanderbilt.edu.