ArticleEuropean journal of human genetics : EJHG2025
Craniofrontonasal syndrome in a patient with an inv(X)(p22.2q13.1), separating EFNB1 from its enhancer.
Article in European journal of human genetics : EJHG, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Modeling the long-range effect of an inversion downstream of EFNB1 concludes a 43-year molecular diagnostic odyssey for craniofrontonasal syndrome.European journal of human genetics : EJHG · 2025Article
- What's new in April's EJHG?European journal of human genetics : EJHG · 2025Article
- Clinical and Molecular Analyses in 8 New Craniofrontonasal Syndrome Families: Revisiting the Mild End of the Phenotypic Spectrum in Females.Turkish archives of pediatrics · 2025Article
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3 authors.
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Abstract
Craniofrontonasal syndrome (CFNS) is an X-linked developmental disorder caused by loss of function variants (LOFVs) in the ephrin B1 (EFNB1) gene located on Xq13.1. In CFNS, unlike in other X-linked disorders, females with heterozygous EFNB1 pathogenic variants (PVs) have a severe phenotype, whereas males carrying hemizygous EFNB1 PVs have a mild phenotype. Here we report a female CFNS patient who was diagnosed with the typical features of CFNS as a new-born. Chromosomal analysis revealed a de novo pericentric inversion of one X chromosome; inv(X)(p22q13). Molecular testing for EFNB1 mutations and a SNP-array test for genomic imbalances returned negative results. We identified the inversion breakpoints using whole genome sequencing (WGS). One of the breakpoints was about 97 kbp downstream of the 3' end of the EFNB1 gene, separating a potential EFNB1 enhancer region from the EFNB1 gene. To our knowledge, this is the first case of CFNS caused by a large structural variant, altering the genomic and regulatory context of EFNB1.
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