GALC Gene Sequencing

GTR Test IDHelpEach Test is a specific, orderable test from a particular laboratory, and is assigned a unique GTR accession number. The format is GTR00000001.1, with a leading prefix 'GTR' followed by 8 digits, a period, then 1 or more digits representing the version. When a laboratory updates a registered test, a new version number is assigned.: GTR000593848.1
Last updated: 2022-08-12
Test version history
- 593848.1, last updated: 2022-08-12

Clinical testHelpIn the U.S., clinical tests must be performed under CLIA certification. When a lab uses the same methods for a test in both clinical and research settings, the test appears as two separate GTR records. for Galactosylceramide beta-galactosidase deficiency
Offered by Institute for Genomic Medicine (IGM) Clinical Laboratory

Interpretation

Not provided

Variants Of Unknown Significance (VUS) Policy And Interpretation

What is the protocol for interpreting a variation as a VUS? HelpDescription of how the laboratory handles Variants of Unknown Significance. This may be a general statement for the laboratory and not specific to this test.: VUS and novel variants will be interpreted by trained variant analysis team member and a lab director using the current ACMG variant classification criteria.
What is the laboratory's policy on reporting novel variations? HelpDescription of how the lab reports novel variations, it may include who gets contacted and how (ex. person ordering the test will be contacted via telephone as soon as VUS is identified).: 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?HelpDoes the laboratory offer testing for a variant of unknown significance to family members, free of charge? (Is test offered to affected individuals and/or presumed obligate carriers to help determine clinical significance of a VUS?): No
Will the lab re-contact the ordering physician if variant interpretation changes? HelpDescription of laboratory procedures to monitor and address reinterpretation of genetic tests results over time, after issuing the report. Does laboratory systematically re-evaluate prior interpretations and generate new reports, or does the person ordering the test need to periodically recontact the labortory to inquire about changes in test interpretation?: 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.

Research

Is research allowed on the sample after clinical testing is complete?HelpAfter clinical testing is complete, does the laboratory perform any research testing using the submitted specimen? (Quality control is not considered as research for this question.): Not provided

Reviews

Clinical resources

Practice guidelines

ACMG ACT, 2022
American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Decreased galactocerebrosidase, elevated psychosine, Krabbe Disease (infantile form), 2022
ACMG Algorithm, 2022
American College of Medical Genetics and Genomics, Algorithm, Krabbe disease: galactocerebrosidase deficiency, 2022
ACMG ACT, 2022
American College of Medical Genetics and Genomics, Newborn Screening ACT Sheet, Decreased galactocerebrosidase, mildly elevated psychosine, Krabbe Disease (late-onset form), 2022
AAP, 2021
Leukodystrophies in Children: Diagnosis, Care, and Treatment, Pediatrics (2021) 148 (3): e2021053126.

Molecular resources

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.