Clinical Genetic Test
offered by
GTR Test Accession:
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GTR000591217.4
CAP
Last updated in GTR: 2023-07-03
View version history
GTR000591217.4, last updated: 2023-07-03
GTR000591217.3, last updated: 2022-07-12
GTR000591217.2, last updated: 2021-07-13
GTR000591217.1, last updated: 2020-07-15
Last annual review date for the lab: 2023-07-07
LinkOut
At a Glance
Test purpose:
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Diagnosis;
Screening
Conditions (1):
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Usher syndrome type 3
Genes (2):
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CLRN1 (3q25.1), CLRN1-AS1 (3q25.1)
Methods (1):
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Molecular Genetics - Targeted variant analysis: Next-Generation (NGS)/Massively parallel sequencing (MPS)
Target population: Help
The Usher Syndrome Type IIIA test offers molecular detection of …
Clinical validity:
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Not provided
Clinical utility:
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Not provided
Ordering Information
Offered by:
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Specimen Source:
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- Amniocytes
- Amniotic fluid
- Cell culture
- Chorionic villi
- Cord blood
- Peripheral (whole) blood
- View specimen requirements
Who can order: Help
- Health Care Provider
- Licensed Physician
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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http://www.questdiagnostics.com/
this test is also included the following carrier panels:
QHerit expanded carrier screening panel-test code 94372
fetal samples: please call GeneInfo at 866.436.3463 to discuss case with a Quest genetic counselor
Order URL
this test is also included the following carrier panels:
QHerit expanded carrier screening panel-test code 94372
fetal samples: please call GeneInfo at 866.436.3463 to discuss case with a Quest genetic counselor
Order URL
Test development:
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Test developed by laboratory (no manufacturer test name)
Informed consent required:
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Based on applicable state law
Test strategy:
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http://www.questdiagnostics.com/
View citations (2)
- http://www.questdiagnostics.com/
- http://www.questdiagnostics.com/
Pre-test genetic counseling required:
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No
Post-test genetic counseling required:
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No
Recommended fields not provided:
Lab contact for this test
Conditions
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Total conditions: 1
Condition/Phenotype | Identifier |
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Test Targets
Genes
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Total genes: 2
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 *
Targeted variant analysis
Next-Generation (NGS)/Massively parallel sequencing (MPS)
* Instrument: Not provided
Clinical Information
Test purpose:
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Diagnosis;
Screening
Target population:
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The Usher Syndrome Type IIIA test offers molecular detection of one pathogenic variant in the CLRN1 gene, N48K (c.144T>G), which accounts for greater than 95% of Ashkenazi-Jewish Usher Syndrome Type IIIA pathogenic variants. Usher Syndrome Type IIIA is a autosomal recessive condition characterized by progressive hearing and vision loss. Symptoms …
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Variant Interpretation:
What is the protocol for interpreting a variation as a VUS?
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not applicable
not applicable
Will the lab re-contact the ordering physician if variant interpretation changes?
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Not provided.
Not provided.
Recommended fields not provided:
Clinical validity,
Clinical utility,
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
Availability:
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Tests performed
Entire test performed in-house
Entire test performed in-house
Analytical Validity:
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analytical validity = 99%
Proficiency testing (PT):
Is proficiency testing performed for this test?
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Yes
Method used for proficiency testing: Help
Formal PT program
PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
Yes
Method used for proficiency testing: Help
Formal PT program
PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
VUS:
Laboratory's policy on reporting novel variations
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not applicable
not applicable
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:
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Category:
FDA exercises enforcement discretion
Additional Information
Reviews:
Clinical resources:
Practice guidelines:
IMPORTANT NOTE:
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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.