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GTR Home > Tests > SNP Microarray Analysis (Chromosomal Microarray)


Sample Negative Report


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Sample Positive Report


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Variants Of Unknown Significance (VUS) Policy And Interpretation

What is the protocol for interpreting a variation as a VUS? Help
VUS and novel variants will be interpreted by trained lab team member and a lab director using current medical literature and databases
What is the laboratory's policy on reporting novel variations? Help
Unusual or clinically significant novel variants will be communicated to the ordering provider via telephone call or email communication.
Are family members with defined clinical status recruited to assess significance of VUS without charge?Help
Will the lab re-contact the ordering physician if variant interpretation changes? Help
Yes, No systemic re-evaluation of previously reported variants/findings are currently performed. However, if the same variant/finding is identified in another patient and current assessment results in change in variant classification/interpretation, then the laboratory will recontact the ordering provider and issue an updated report.


Is research allowed on the sample after clinical testing is complete?Help
Not provided

Practice guidelines

  • NSGC, 2021
    National Society of Genetic Counselors Position Statement: Prenatal Cell-Free DNA Screening

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the 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.