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Early Onset Alzheimer's NGS Diagnostic Test

CPT

81405; 81406(x2); 81479

Test Details

Methodology

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

Result Turnaround Time

14 - 28 days

Use

Diagnostic testing

Special Instructions

This assay currently is not available in New York state.

Contact an Integrated Genetics laboratory genetic coordinator at 800-255-7357 with any questions.

Specimen Requirements

Test Includes

This test includes: APP, PSEN1, PSEN2.

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.

References

Bird TD. Alzheimer disease overview. Adam MP, Ardinger HH, Pagon RA, et al, eds. In: GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2021.1998 Oct 23 [updated 2018 Dec 20].20301340
Cacace R, Sleegers K, Van Broeckhoven C. Molecular genetics of early-onset Alzheimer's disease revisited. Alzheimers Dement. 2016 Jun;12(6):733-748.27016693
D'Argenio V, Sarnataro D. New insights into the molecular bases of familial Alzheimer's disease. J Pers Med. 2020 Apr 19;10(2):26.32325882
Schellenberg GD, Montine TJ. The genetics and neuropathology of Alzheimer's disease. Acta Neuropathol. 2012 Sep;124(3):305-323.22618995

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)

Storage Instructions

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

Causes for Rejection

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

Collection Instructions

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

Stability Requirements

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

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

Frozen: do not freeze

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
630557 Early Onset Alzheimer's Panel 51969-4 630559 Result 51969-4
630557 Early Onset Alzheimer's Panel 51969-4 630560 Interpretation 50398-7
630557 Early Onset Alzheimer's Panel 51969-4 630575 Footnotes 8251-1
630557 Early Onset Alzheimer's Panel 51969-4 630576 PDF 51969-4
Order Code630557
Order Code NameEarly Onset Alzheimer's Panel
Order Loinc51969-4
Result Code630559
Result Code NameResult
UofM
Result LOINC51969-4
Order Code630557
Order Code NameEarly Onset Alzheimer's Panel
Order Loinc51969-4
Result Code630560
Result Code NameInterpretation
UofM
Result LOINC50398-7
Order Code630557
Order Code NameEarly Onset Alzheimer's Panel
Order Loinc51969-4
Result Code630575
Result Code NameFootnotes
UofM
Result LOINC8251-1
Order Code630557
Order Code NameEarly Onset Alzheimer's Panel
Order Loinc51969-4
Result Code630576
Result Code NamePDF
UofM
Result LOINC51969-4