Whole Exome Sequencing Comparator - Mother

TEST: 620192
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CPT: 81416
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Special Instructions

This specimen should be collected from the mother of the patient for whom Whole Exome Sequencing - DUO (Proband) [620023] or Whole Exome Sequencing - TRIO (Proband) [620022] is being ordered. The test to be ordered for the mother is Whole Exome Sequencing Comparator - Mother [620192].

Expected Turnaround Time

28 - 42 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Information

Related Documents

For more information, please view the literature below. These forms are required to submit for whole exome sequencing.

Clinical Questionnaire for Whole Exome/Genome Sequencing

Informed Consent: Whole Exome & Whole Genome Sequencing

    Specimen Requirements

    Specimen

    Whole blood; oral swab or extracted DNA (from blood or oral swab only)

    Volume

    Whole blood: 4 mL; oral swab: 3 swabs; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

    Minimum Volume

    Whole blood: 2 mL; oral swab: 1 swab; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

    Container

    Whole blood: lavender-top (EDTA) tube; oral swab: OCD-100 DNA Genotek; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

    Collection

    Whole blood: standard phlebotomy; oral swab: follow kit instructions; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

    Storage Instructions

    Maintain specimen at room temperature or refrigerate at 4°C. Do not freeze.

    Stability Requirements

    • Room temperature: whole blood: 14 days; swab: 60 days

    • Refrigerated: whole blood: 30 days; swab: 60 days

    • Frozen: do not freeze

    Causes for Rejection

    Frozen or hemolyzed specimen; quantity not sufficient for analysis; improper container

    Test Details

    Use

    Diagnostic testing

    Limitations

    This assay will not consistently detect mosaicism or rule out the presence of large chromosomal aberrations, including rearrangements and inversions that do not change copy number of genomic regions. This NGS assay does not detect repeat expansions. False positive or false negative results may occur for reasons that include insufficient information available about rare genetic variants, sex chromosome abnormalities, pseudogene interference, homologous regions, blood transfusions, bone marrow transplantation, somatic or tissue-specific mosaicism/heteroplasmy, mislabeled samples or erroneous representation of family relationships. For panels with mitochondrial DNA assessment, low levels of heteroplasmy may not be reliably detected. Interpretation of the clinical significance of gene variations is limited by information about the variant that is available at the time of reporting and by the quality and quantity of clinical information provided with the sample. The interpretation of the clinical significance of variants may change.

    This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.

    Methodology

    Next-generation sequencing to identify genetic variants, including single nucleotide variants (SNVs), insertions, deletions and copy number variants (CNVs)

    LOINC® Map

    Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
    620192 Whole Exome Seq - Mother 620181 Preauthorization N/A
    620192 Whole Exome Seq - Mother 620193 Result 86205-2
    620192 Whole Exome Seq - Mother 630859 PDF 80563-0

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    The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf