Collect whole blood in a purple top (EDTA) tube.
Refrigerate sample until shipment. Send the sample at room temperature with overnight delivery for receipt Monday through Friday within 24 hours of collection.
Whole blood can be refrigerated until shipment.
Heparinized specimens, severely hemolyzed specimens, frozen, clotted or possibly commingled specimens, blood in non-sterile or leaky containers, mislabeled or inappropriately labeled specimens.
Do not heat, freeze or centrifuge blood before shipment. Refrigerate sample until shipment.
Mon - Fri 9:00am to 4:00pm
81404, 81406, 81407, 81479x12
Early Infantile Epileptic Encephalopathy (EIEE) is a severe age-related epileptic encephalopathy. Major characteristics of EIEE include onset in early infancy (neonatal period through the ﬁrst few months of life), impaired motor development, cognitive development, and sensory development. Genetic etiology of EIEE is heterogeneous and the EIEE panel includes 15 genes (see Table 1 for additional details). Mutations in these genes have been described in individuals with an EIEE phenotype.
The genes involved in the EIEE panel include ARX, CDKL5, SLC25A22, STXBP1, SPTAN1, SCN1A, GABRG2, KCNQ2, ARHGEF2, PCDH19, PNKP, SCN2A, PLCB1, GABRD, and MEF2C. Mutations in these disorders can be inherited in an autosomal dominant, autosomal recessive, or X-linked pattern.
Genomic DNA is extracted from blood or other patient tissues following standard DNA extraction protocols. This test is performed by next generation sequencing using the SureSelectXT Target Enrichment System (Agilent Inc) followed by Illumina MiSeq sequencing (2x 150bp paired end) of the coding regions and splice sites of the targeted genes. FASTQ data is de-multiplexed based on sample-specific index sequence using the MiSeq Reporter software and aligned to human reference genome hg19 using Novoalign. Variants are then called using the GATK pipeline and annotated using ANNOVAR and SnpEff.
Sanger sequencing is performed to confirm clinically significant variants and to fill in regions with insufficient coverage (bases with less than 30X coverage). Variants that are classified as benign or likely benign will not be confirmed.
Test results with interpretation will be mailed and/or faxed to the referring physician or send out lab following completion of the test. Additional reports will be provided as requested.
The clinical utility of the assay is to support a clinical diagnosis of the disease, facilitate genetic counseling, and assess the risk to other first degree relatives and to facilitate testing of at - risk family members.
Whole blood in EDTA purple top tubes is the preferred sample. High molecular weight genomic DNA, cheek epithelial cells, or other samples containing DNA may be acceptable. Contact the laboratory for specific instructions regarding such samples before sending the sample.
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