Test Code | D5241 |
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Test Summary |
This panel analyzes genes associated with muscular dystrophy using a genome sequencing-based method, providing full gene sequencing and analysis of targeted genes. This panel includes repeat expansion disorder screening for a subset of genes. |
Turn Around Time | 4 weeks |
Acceptable Sample Types | DNA, Isolated , Dried Blood Spots , Saliva , Whole Blood (EDTA) |
Acceptable Billing Types | Institutional Billing , Self (patient) Payment |
NY Approved | No |
CPT Codes** | 81479(x2), 81312(x1), 81443(x1) |
Whole genome sequencing is performed on genomic DNA using 2X150bp reads on Illumina next-generation sequencing (NGS) systems at a mean coverage of 40x. A base is considered low coverage at less than 8x. A list of low-coverage regions, if any, is available upon request.
Alignment to the human reference genome (GRCh37) is performed and annotated variants are identified in the targeted region. Variants reviewed have a minimum coverage of 8x and an alternate allele frequency of 20% or higher. Indels and single nucleotide variants (SNVs) may be confirmed by Sanger sequence analysis before reporting at the director's discretion. Genes and/or exons located in pseudogene regions are not covered in this assay. Copy number variation (CNV) analysis detects deletions and duplications; in some instances, due to the size of the exons, sequence complexity, or other factors, not all CNVs may be analyzed or may be difficult to detect. CNV analysis will not detect tandem repeats, balanced alterations (reciprocal translocations, Robertsonian translocations, inversions, and balanced insertions), methylation abnormalities, triploidy, and genomic imbalances in segmentally duplicated regions. This assay is not designed to detect mosaicism; possible cases of mosaicism may be investigated at the discretion of the laboratory director.
Primary data analysis is performed using Illumina bcl2fastq converter v2.19. Secondary analysis is performed using Illumina DRAGEN Bio-IT Platform v.3.10.8. Tertiary data analysis is performed using SnpEff v5.0 and Revvity Omics' internal ODIN v.1.01 software. CNV and absence of heterozygosity are assessed using BioDiscovery's NxClinical v6.1 software.
Collection Container(s) | Oragene™ Saliva Collection Kit or ORAcollect-Dx kit |
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Collection | Collect saliva on an Oragene™ Saliva Collection Kit ORAcollect-Dx kit according to the manufacturer's instructions. |
Sample Condition | Store at ambient temperature. Do not refrigerate or freeze. |
Shipping | Ship overnight at ambient temperature. |
Special Sample Instructions | Please contact Revvity Omics to request the saliva collection kit for patients who cannot provide a blood sample as whole blood is the preferred sample. Testing using Saliva swabs is currently not available for customers in India. Contact the Revvity Omics laboratory for more information. |
Collection Container(s) | Dried blood spot card |
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Collection | Follow kit instructions. Briefly, allow blood to saturate the card until indicated areas are filled and blood has soaked through the card. Air dry the card at ambient temperature for at least 3 hours.
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Sample Condition | Follow the instructions provided with the collection set. Store the dried blood at ambient temperature for up to two days. If the specimen cannot be sent as soon as it is dry, the filter paper should be placed in a sealable plastic bag and stored in a refrigerator (≤ 8°C) or preferably in a freezer. |
Shipping | Follow kit instructions. Double bag and ship overnight at ambient temperature. |
Collection | Required DNA Quantity by Test Type*:
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Sample Condition | * Required DNA Quality: High molecular weight DNA (>12kb). A260/A280 reading should be ≥ 1.8. A260/230 a ratio range of 1.8 to 2.2. Contact the laboratory for specific amounts if total ng cannot be met. |
Shipping | Ship overnight at ambient temperature. |
Special Sample Instructions |
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Collection Container(s) | EDTA (purple top) |
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Collection | Infants (< 2-years): 2 to 3 mL; Children (>2-years): 3 to 5 mL; Older children and adults: Minimum 5mL. The blood tube should be inverted several times immediately after blood collection to prevent coagulation. |
Sample Condition | Store at ambient temperature. Do not refrigerate or freeze. |
Shipping | Ship overnight at ambient temperature ensuring receipt within 5-days of collection. |
Special Sample Instructions | Clotted or hemolyzed samples are not accepted. |