Panel Description

Ehlers-Danlos Syndrome
The Ehlers-Danlos Panel examines 21 genes associated with Ehlers-Danlos Syndrome (EDS).

Patients with a personal and/or family history suggestive of EDS. EDS is a disorder that primarily affects the joints and skin. There are six major types of EDS including: classical, hypermobility, vascular, kyphoscoliosis, arthrochalasia, and dermatosparaxis. Symptoms of affected individuals can include, but are not limited to, having hypermobility, loose joints, abnormal scarring, easy bruising,  and dilation and/or rupture of major blood vessels.

Patients identified with EDS can benefit from increased surveillance and preventative steps to better manage their risks. Medical intervention can include curative and prophylactic surgeries, lifestyle changes, physical therapy, and medications like analgesics and NSAIDs. Also, your patient’s family members can be tested to help define their risk. If a pathogenic variant is identified in your patient, close relatives (children, siblings, parents) could have as high as a 50% risk to also be at increased risk. In some cases, screening should begin in childhood.

Test Description

  • Sequencing
  • Del/Dup
  • Rush / STAT
  • Exclude VUS
  • MCC
  • Duo/Trio
2.9 – 3.857142857142857 weeks
Call for details
ADAMTS2, B3GALT6, B4GALT7, C1R, C1S, CHST14, COL12A1, COL1A1, COL1A2, COL3A1, COL5A1, COL5A2, CRTAP, DSE, FKBP14, FLNA, P3H1, PLOD1, PRDM5, SLC39A13, TNXB, ZNF469 ( 22 genes )
96% at 20x
Blood (two 4ml EDTA tubes, lavender top) or Extracted DNA (3ug in EB buffer) or Buccal Swab or Saliva (kits available upon request)
All sequencing technologies have limitations. This analysis is performed by Next Generation Sequencing (NGS) and is designed to examine coding regions and splicing junctions. Although next generation sequencing technologies and our bioinformatics analysis significantly reduce the contribution of pseudogene sequences or other highly-homologous sequences, these may still occasionally interfere with the technical ability of the assay to identify pathogenic variant alleles in both sequencing and deletion/duplication analyses. Sanger sequencing is used to confirm variants with low quality scores and to meet coverage standards. If ordered, deletion/duplication analysis can identify alterations of genomic regions which include one whole gene (buccal swab specimens and whole blood specimens) and are two or more contiguous exons in size (whole blood specimens only); single exon deletions or duplications may occasionally be identified, but are not routinely detected by this test. Identified putative deletions or duplications are confirmed by an orthogonal method (qPCR or MLPA). This assay will not detect certain types of genomic alterations which may cause disease such as, but not limited to, translocations or inversions, repeat expansions (eg. trinucleotides or hexanucleotides), alterations in most regulatory regions (promoter regions) or deep intronic regions (greater than 20bp from an exon). This assay is not designed or validated for the detection of somatic mosaicism or somatic mutations.

Gene Notes
TNXB This gene is susceptible to significant pseudogene interference, particularly for exons 32-44 (NM_019105.6). Exons 33, 37, and 38 are not evaluated by this test. In addition, copy number analysis is not available for regions spanning exon 32-34 and 36-44. Sequencing variants detected in exons 32, 34-36, and 39-44 will be confirmed by long-range PCR and Sanger sequencing as an alternative methodology.

Resource

 – Levy, H.P. Ehlers-Danlos Syndrome, Hypermobility Type. 2004 Oct 22 [Updated 2016 Mar 31]. In: Pagon RA, Adam MP, Ardinger HH, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle (1993-2017)
 Malfait F, Wenstrup R, De Paepe A. Ehlers-Danlos Syndrome, Classic Type. 2007 May 29 [Updated 2011 Aug 18]. In: Pagon RA, Adam MP, Ardinger HH, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle (1993-2017)
 Pepin, M.G., Murray, M.L., Byers, P.H. Vascular Ehlers-Danlos Syndrome. 1999 Sep 2 [Updated 2015 Nov 19]. In: Pagon RA, Adam MP, Ardinger HH, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle (1993-2017)
 Yeowell, H.N., Steinmann, B. Ehlers-Danlos Syndrome, Kyphoscoliotic Form. 2000 Feb 2 [Updated 2013 Jan 24]. In: Pagon RA, Adam MP, Ardinger HH, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle (1993-2017)