Table 1.

Summary of Molecular Genetic Testing Used in NSDHL-Related Disorders

Gene 1Test MethodProportion of Probands with a Pathogenic Variant 2 Detectable by This Method
NSDHLSequence analysis 3, 434/39 5
Gene-targeted deletion/duplication analysis 65/39 7
Unknown 8NA
1.
2.

See Molecular Genetics for information on allelic variants detected in this gene.

3.

Sequence analysis detects variants that are benign, likely benign, of uncertain significance, likely pathogenic, or pathogenic. Pathogenic variants may include small intragenic deletions/insertions and missense, nonsense, and splice site variants; typically, exon or whole-gene deletions/duplications are not detected. For issues to consider in interpretation of sequence analysis results, click here.

4.

Lack of amplification by PCR prior to sequence analysis can suggest a putative (multi)exon or whole-gene deletion on the X chromosome in affected males; confirmation requires additional testing by gene-targeted deletion/duplication analysis

5.

Extrapolated from Bornholdt et al [2005]

6.

Gene-targeted deletion/duplication analysis detects intragenic deletions or duplications. Methods that may be used include: quantitative PCR, long-range PCR, multiplex ligation-dependent probe amplification (MLPA), and a gene-targeted microarray designed to detect single-exon deletions or duplications.

7.

Deletion of the gene or of multiple exons has been reported [Bornholdt et al 2005, Kim et al 2005] in CHILD syndrome only.

8.

Although controversial [König et al 2002, Elias et al 2012], pathogenic variants in EBP have been reported in rare persons with clinical features similar to CHILD syndrome [Grange et al 2000]. To date, no other individuals with EBP pathogenic variants and clinical features similar to CHILD syndrome have been reported.

From: NSDHL-Related Disorders

Cover of GeneReviews®
GeneReviews® [Internet].
Pagon RA, Adam MP, Ardinger HH, et al., editors.
Seattle (WA): University of Washington, Seattle; 1993-2017.
Copyright © 1993-2017, University of Washington, Seattle. GeneReviews is a registered trademark of the University of Washington, Seattle. All rights reserved.

GeneReviews® chapters are owned by the University of Washington. Permission is hereby granted to reproduce, distribute, and translate copies of content materials for noncommercial research purposes only, provided that (i) credit for source (http://www.genereviews.org/) and copyright (© 1993-2017 University of Washington) are included with each copy; (ii) a link to the original material is provided whenever the material is published elsewhere on the Web; and (iii) reproducers, distributors, and/or translators comply with the GeneReviews® Copyright Notice and Usage Disclaimer. No further modifications are allowed. For clarity, excerpts of GeneReviews chapters for use in lab reports and clinic notes are a permitted use.

For more information, see the GeneReviews® Copyright Notice and Usage Disclaimer.

For questions regarding permissions or whether a specified use is allowed, contact: ude.wu@tssamda.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.