GTR Test Accession:
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GTR000326380.2
Last updated in GTR: 2021-11-18
View version history
GTR000326380.2, last updated: 2021-11-18
GTR000326380.1, last updated: 2014-04-14
Last annual review date for the lab: 2021-11-18
Past due
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At a Glance
Test purpose:
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Diagnosis;
Mutation Confirmation
Conditions (1):
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Macrothrombocytopenia and granulocyte inclusions with or without nephritis or sensorineural hearing loss
Genes (1):
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MYH9 (22q12.3)
Methods (2):
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Molecular Genetics - Deletion/duplication analysis: Multiplex Ligation-dependent Probe Amplification (MLPA); ...
Target population: Help
Patients with familial macrothrombocytopenia, especially if other syndromic features are …
Clinical validity:
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Not provided
Clinical utility:
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Establish or confirm diagnosis;
Predictive risk information for patient and/or family members
Ordering Information
Offered by:
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Test short name:
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MYH9-RD
Specimen Source:
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- Amniocytes
- Amniotic fluid
- Buccal swab
- Chorionic villi
- Cord blood
- Fetal blood
- Isolated DNA
- Peripheral (whole) blood
- View specimen requirements
Who can order: Help
- Genetic Counselor
- Health Care Provider
- Licensed Physician
- Nurse Practitioner
Test Order Code:
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MYH9
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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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 Prenatal Testing
Custom mutation-specific/Carrier testing
Custom mutation-specific/Carrier testing
Test development:
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Test developed by laboratory (no manufacturer test name)
Informed consent required:
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Decline to answer
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:
Lab contact for this test,
Test strategy
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: 2
Method Category
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Test method
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Instrument
Deletion/duplication analysis
Multiplex Ligation-dependent Probe Amplification (MLPA)
ABI 3130xl
Sequence analysis of the entire coding region
Uni-directional Sanger sequencing
Applied Biosystems 3130xl capillary sequencer
Clinical Information
Test purpose:
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Diagnosis;
Mutation Confirmation
Clinical utility:
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Establish or confirm diagnosis
Predictive risk information for patient and/or family members
Predictive risk information for patient and/or family members
Target population:
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Patients with familial macrothrombocytopenia, especially if other syndromic features are present such as deafness, kidney problems, dohle bodies etc.
Variant Interpretation:
What is the protocol for interpreting a variation as a VUS?
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Exclude as a SNP - search gnomAD, db-SNP etc. In silico analysis. Does variant co-segregate with the disease phenotype. ACMG variant analysis guidelines used.
Exclude as a SNP - search gnomAD, db-SNP etc. In silico analysis. Does variant co-segregate with the disease phenotype. ACMG variant analysis guidelines used.
Are family members with defined clinical status recruited to assess significance of VUS without charge?
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Yes. If possible
Yes. If possible
Will the lab re-contact the ordering physician if variant interpretation changes?
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Yes. If significant
Yes. If significant
Recommended fields not provided:
Clinical validity,
Is research allowed on the sample after clinical testing is complete?,
Sample negative report,
Sample positive report
Technical Information
Test Procedure:
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Result confirmed on an independent analysis from the initial sample.
Test Confirmation:
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Result confirmed on an independent analysis from the initial sample.
Availability:
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Tests performed
Entire test performed in-house
Entire test performed in-house
Analytical Validity:
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Analysis of coding & immediate flanking regions should provide a >95% sensitivity - based on current knowledge.
Proficiency testing (PT):
Is proficiency testing performed for this test?
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No
No
VUS:
Software used to interpret novel variations
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Alamut and others available on-line e.g. PMut Varsome and Franklin used for variant analysis.
Laboratory's policy on reporting novel variations Help
In silico analysis included on report with interpretation. ACMG variant analysis guidelines used. Follow-up discussion available.
Alamut and others available on-line e.g. PMut Varsome and Franklin used for variant analysis.
Laboratory's policy on reporting novel variations Help
In silico analysis included on report with interpretation. ACMG variant analysis guidelines used. Follow-up discussion available.
Recommended fields not provided:
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:
Not Applicable
Additional Information
Clinical resources:
Molecular resources:
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Patients and consumers
with specific questions about a genetic test should contact a health care provider or a genetics professional.