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GTR Home > Tests > Familial Variant Targeted Sequencing


This is a clinical test intended for Help: Diagnosis, Mutation Confirmation, Risk Assessment

Clinical summary


Genetic diseases are diseases in which inherited genes predispose to increased risk. The genetic disorders associated with cancer often result from an alteration or mutation in a single gene. The diseases range from rare dominant cancer family syndrome to familial tendencies in which low-penetrance genes may interact with other genes or environmental factors to induce cancer. Research may involve clinical, epidemiologic, and laboratory studies of persons, families, and populations at high risk of these disorders. [from NCI]

Conditions tested

Target population


Family members of a proband with known variant(s) previously identified by clinical or research sequence analysis. Patients who previously had variant(s) identified by research sequence analysis and need confirmation testing performed by clinical laboratory. This targeted testing is available for any gene found in the human genome and is performed by Sanger sequencing. Positive control sample from the proband or previously tested carrier family member is required.


Not provided

Clinical validity


Not provided

Clinical utility


Not provided

Clinical resources

Practice guidelines

  • ACMG, 2016
    Recommendations for reporting of secondary findings in clinical exome and genome sequencing, 2016 update (ACMG SF v2.0): a policy statement of the American College of Medical Genetics and Genomics.
  • ASHG/ACMG, 2015
    Points to Consider: Ethical, Legal, and Psychosocial Implications of Genetic Testing in Children and Adolescents
  • ACMG, 2015
    Clinical utility of genetic and genomic services: a position statement of the American College of Medical Genetics and Genomics.
  • ACMG, 2015
    Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.
  • ACMG, 2013
    ACMG recommendations for reporting of incidental findings in clinical exome and genome sequencing.

Consumer resources

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.