Comprehensive Hearing Loss NGS Panel + mtDNA

CPT: 81430; 81431; 81460; 81465

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Test Includes

This test includes: ABHD12, ACTG1, ACVR1, ADAM17, AFF4, AIFM1, ALMS1, ALX3, AMER1, ANKH, ARHGDIA, ATP2B2, ATP6V1B1, ATP6V1B2, B3GAT3, BSND, BTK, CACNA1D, CCBE1, CCDC50, CCND1, CD164, CDH23, CEACAM16, CEP78, CIB2, CISD2, CLDN14, CLIC5, CLPP, CLRN1, COCH, COL11A1, COL11A2, COL2A1, COL4A3, COL4A4, COL4A5, COL4A6, COL9A1, COL9A2, COLEC11, CRYM, DCDC2, DCHS1, DDX3X, DFNA5, DFNB31, DFNB59, DHODH, DIABLO, DIAPH1, DIAPH3, DLX5, DMXL2, DNAAF3, DSPP, DUSP6, DVL1, DVL3, EDN1, EDN3, EDNRA, EDNRB, EFTUD2, ELMOD3, EPG5, EPS8L2, ESPN, ESRRB, EYA1, EYA4, FANCI, FAT4, FDXR, FGF10, FGF3, FGFR1, FGFR2, FGFR3, FIBP, FLNB, FLRT3, FOXI1, FRAS1, FREM2, GAS8, GATA3, GDF6, GIPC3, GJB2, GJB3, GJB6, GLYCTK, GMNN, GPR98, GPSM2, GRHL2, GRIP1, GRXCR1, GRXCR2, GSC, GTF2E2, GUCY2D, GZF1, HAAO, HACE1, HARS2, HOMER2, HOXA11, HOXA2, HSD17B4, IL17RD, IMPAD1, IRX5, KARS, KAT6B, KCNE1, KCNH1, KCNJ10, KCNQ1, KCNQ4, KITLG, KMT2A, LARS, LARS2, LEP, LHFPL5, LMX1B, LONP1, LOXHD1, LRP4, LRP5, LRTOMT, MAF, MAFB, MAPRE2, MASP1, MCM2, MECOM, MEGF8, MEOX1, MET, MGP, MIR96, MITF, MORC2, MYCN, MYH14, MYH9, MYO3A, MYO6, MYO7A, MYO15A, NARS2, NLRP3, NOG, NOTCH2, OPA1, OSBPL2, OTOF, P2RX2, PAX1, PAX2, PAX3, PBX1, PCDH15, PCNA, PDZD7, PET100, PEX1, PEX6, PIK3CD, PIK3R1, PNPT1, POGZ, POLD1, POLR1A, POLR1C, POLR1D, POR, POU3F4, POU4F3, PRDM5, PRKAR1A, PRKDC, PROKR2, PRPS1, PRRX1, PTPRQ, PYCR2, RAB23, RAC1, RBMX, RCBTB1, RDH11, RNASET2, RPL11, RPS23, RPS26, RPS28, SALL1, SALL4, SC5D, SERPINB6, SGPL1, SIX1, SLC17A8, SLC26A2, SLC26A4, SLC26A5, SLC39A8, SLC44A4, SLC4A11, SLITRK6, SMPX, SNAI2, SNX14, SOST, SOX10, SOX2, SOX9, SPATA5, SPECC1L, SPRY4, STAMBP, STRC, SYNE4, SYT2, TANGO2, TBC1D24, TBX1, TCOF1, TECTA, TFAP2A, TIMM8A, TMC1, TMIE, TMPRSS3, TNC, TNFRSF11B, TP63, TPRN, TRIOBP, TSHZ1, TSR2, TWIST1, TWIST2, TXNL4A, UBR1, USH1C, USH1G, USH2A, VHL, VPS11, WAC, WFS1, XPNPEP3, XRCC4, XYLT2, YAP1, ZBTB20, ZNF469, ZNF687, MT-ATP8, MT-ATP6, MT-CO1, MT-CO2, MT-CO3, MT-CYB, MT-ND1, MT-ND2, MT-ND3, MT-ND4L, MT-ND4, MT-ND5, MT-ND6, MT-RNR2, MT-TA, MT-TR, MT-TN, MT-TD, MT- TC, MT-TE, MT-TQ, MT-TG, MT-TH, MT-TI, MT-TL1, MT-TL2, MT-TK, MT-TM, MT-TF, MT-TP, MT- TS1, MT-TS2, MT-TT, MT-TW, MT-TY, MT-TV, MT-RNR1, MT-RNR2.

Expected Turnaround Time

14 - 28 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.

Genes Assessed

Specimen Requirements

Specimen

Whole blood at room temperature; oral swab; extracted DNA (from blood, oral swab or muscle only) or frozen muscle tissue

Volume

Whole blood: 4 mL; oral swab: 3 swabs; muscle: 75 milligrams; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

Minimum Volume

Whole blood: 2 mL; oral swab: 1 swab; muscle: 50 milligrams; 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; muscle: sterile screw-capped vial; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

Collection

Whole blood: standard phlebotomy; oral swab: follow kit instructions; muscle: snap freeze in liquid nitrogen and maintain at -80°C; or extracted DNA: contact MNG Genetic Services 844-664-8378 (844-MNGTEST)

Storage Instructions

Maintain whole blood and oral swab specimens at room temperature or refrigerate at 4°C. Do not freeze. Muscle specimen: Maintain frozen and ship on dry ice.

Stability Requirements

• Room temperature: whole blood: 14 days; swab: 60 days; muscle: 0 days

• Refrigerated: whole blood: 30 days; swab: 60 days; muscle; 0 days

• Frozen: muscle: 15 years

Causes for Rejection

Hemolyzed; quantity not sufficient for analysis; improper container; improper storage temperature

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 single nucleotide variants (SNVs), insertions, deletions and copy number variants (CNVs); for the mitochondrial genome, next generation sequencing of long range PCR products

Footnotes

1. Koffler T, Ushakov K, Avraham KB. Genetics of Hearing Loss: Syndromic. Otolaryngol Clin North Am. 2015 Dec;48(6):1041-1061.26443487

2. National Institutes of Heath, U.S. National Library of Medicine. Usher syndrome. Genetics Home Reference web site. https://ghr.nlm.nih.gov/condition/usher-syndrome. Accessed May 13, 2020.

3. National Institutes of Heath, U.S. National Library of Medicine. Waardenburg syndrome. Genetics Home Reference web site. https://ghr.nlm.nih.gov/condition/waardenburg-syndrome. Accessed May 13, 2020.

4. National Institutes of Heath, U.S. National Library of Medicine. Nonsyndromic hearing loss. Genetics Home Reference web site. https://ghr.nlm.nih.gov/condition/nonsyndromic-hearing-loss. Accessed May 13, 2020.

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