GTR Test Accession:
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GTR000322874.4
Last updated in GTR: 2018-02-09
View version history
GTR000322874.4, last updated: 2018-02-09
GTR000322874.3, last updated: 2017-02-25
GTR000322874.2, last updated: 2015-02-27
GTR000322874.1, last updated: 2014-03-01
Last annual review date for the lab: 2024-02-15
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At a Glance
Test purpose:
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Diagnosis;
Mutation Confirmation
Conditions (1):
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Charcot-Marie-Tooth disease axonal type 2C
Genes (1):
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TRPV4 (12q24.11)
Methods (1):
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Molecular Genetics - Sequence analysis of select exons: Bi-directional Sanger Sequence Analysis
Target population: Help
Not provided
Clinical validity:
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Not provided
Clinical utility:
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Not provided
Ordering Information
Offered by:
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Test short name:
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CMT2C
Specimen Source:
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- Isolated DNA
- Peripheral (whole) blood
Who can order: Help
- Genetic Counselor
- Health Care Provider
- Licensed Physician
Lab contact:
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Contact Policy:
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Laboratory can only accept contact from health care providers. Patients/families are encouraged to discuss genetic testing options with their health care provider.
How to Order:
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Patient samples should be shipped via overnight delivery at room temperature. Each specimen should be labeled with the patient’s name, date of birth, medical record number/unique identifier, and date of sample collection. No weekend or holiday deliveries. Send specimens with a completed sample requisition form, otherwise, specimen processing may be …
Test service:
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Clinical Testing/Confirmation of Mutations Identified Previously
Confirmation of research findings
Confirmation of research findings
Test additional service:
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Custom mutation-specific/Carrier testing
Test development:
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Test developed by laboratory but exempt from FDA oversight (eg. NYS CLEP approved, offered within a hospital or clinic)
Informed consent required:
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Decline to answer
Test strategy:
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Testing can be performed by sequencing only exons 5 and 6,
or sequencing all 16 exons, including part of the 5’ UTR, the surrounding intronic regions, all the exon-intron boundaries and splice sites, and part of the 3' UTR.
Pre-test genetic counseling required:
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Decline to answer
Post-test genetic counseling required:
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Decline to answer
Recommended fields not provided:
Test Order Code
Conditions
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Total conditions: 1
Condition/Phenotype | Identifier |
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Test Targets
Genes
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Total genes: 1
Gene | Associated Condition | Germline or Somatic | Allele (Lab-provided) | Variant in NCBI |
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Methodology
Total methods: 1
Method Category
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Test method
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Instrument
Sequence analysis of select exons
Bi-directional Sanger Sequence Analysis
Applied Biosystems 3500 capillary sequencing instrument
Clinical Information
Test purpose:
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Diagnosis;
Mutation Confirmation
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:
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Sequence analysis of exons 5, 6
Sequencing analysis of the entire coding region
Sequencing analysis of the entire coding region
Availability:
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Tests performed
Entire test performed in-house
Entire test performed in-house
Analytical Validity:
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99% accurate by PCR and sequencing
Proficiency testing (PT):
Is proficiency testing performed for this test?
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Yes
Method used for proficiency testing: Help
Intra-Laboratory
Yes
Method used for proficiency testing: Help
Intra-Laboratory
Recommended fields not provided:
Test Confirmation,
Assay limitations,
Description of internal test validation method,
Citations for Analytical validity,
PT Provider,
Description of PT method,
Major CAP category, CAP category, CAP test list
Regulatory Approval
FDA Review:
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Category:
FDA exercises enforcement discretion
Additional Information
Clinical resources:
Molecular resources:
Consumer resources:
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.