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Huntington Disease
Clinical Genetic Test
Help
offered by
Defense Health Agency Genetics Reference Laboratory
GTR Test Accession: Help GTR000025312.2
CAP
INHERITED DISEASENERVOUS SYSTEM
Last updated in GTR: 2017-04-12
View version history
Last annual review date for the lab: 2024-09-20 LinkOut
At a Glance
Test purpose: Help
Diagnosis; Pre-symptomatic
Conditions (1): Help
Huntington disease
Genes (1): Help
HTT (4p16.3)
Methods (1): Help
Molecular Genetics - Targeted variant analysis: Trinucleotide repeat by PCR or Southern Blot
Target population: Help
Not provided
Clinical validity: Help
Not provided
Clinical utility: Help
Not provided
Ordering Information
Offered by: Help
Defense Health Agency Genetics Reference Laboratory
View lab's website
Specimen Source: Help
  • Peripheral (whole) blood
Contact Policy: Help
Laboratory can only accept contact from health care providers. Patients/families are encouraged to discuss genetic testing options with their health care provider.
Test additional service: Help
Custom Prenatal Testing
Informed consent required: Help
Yes
Pre-test genetic counseling required: Help
Yes
Post-test genetic counseling required: Help
Yes
Recommended fields not provided:
Test Order Code, How to Order, Lab contact for this test, Test strategy, Test development
Conditions Help
Total conditions: 1
Condition/Phenotype Identifier
Test Targets
Genes Help
Total genes: 1
Gene Associated Condition Germline or Somatic Allele (Lab-provided) Variant in NCBI
Methodology
Total methods: 1
Method Category Help
Test method Help
Instrument *
Targeted variant analysis
Trinucleotide repeat by PCR or Southern Blot
* Instrument: Not provided
Clinical Information
Test purpose: Help
Diagnosis; Pre-symptomatic
Recommended fields not provided:
Clinical validity, Clinical utility, Target population, What is the protocol for interpreting a variation as a VUS?, Are family members with defined clinical status recruited to assess significance of VUS without charge?, Will the lab re-contact the ordering physician if variant interpretation changes?, Is research allowed on the sample after clinical testing is complete?, Sample negative report, Sample positive report
Technical Information
Test Comments: Help
Testing of asymptomatic family members requires documentation of genetic counseling, neurology evaluation and psychological evaluation. A unique consent form is also required. Contact the laboratory for a test information packet.
Services offered for MILITARY HEALTHCARE BENEFICIARIES ONLY
Availability: Help
Tests performed
Entire test performed in-house
Analytical Validity: Help
Detects 99% of expanded alleles.
Proficiency testing (PT):
Is proficiency testing performed for this test? Help
Yes

Method used for proficiency testing: Help
Formal PT program

PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
Recommended fields not provided:
Test Confirmation, Assay limitations, Description of internal test validation method, Citations for Analytical validity, Description of PT method, Major CAP category, CAP category, CAP test list
Regulatory Approval
FDA Review: Help
Not provided
Additional Information

IMPORTANT NOTE: NIH does not independently verify information submitted to GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.