CAH-X Syndrome: Genetic and Clinical Profile
The term CAH-X was coined to describe a subset of patients with 21-hydroxylase deficiency displaying a phenotype compatible with the hypermobility type of Ehlers Danlos syndrome. The genetic defect is due to the monoallelic presence of a CYP21A2 deletion extending into the gene encoding tenascin X (...
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Veröffentlicht in: | Molecular diagnosis & therapy 2022-05, Vol.26 (3), p.293-300 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The term CAH-X was coined to describe a subset of patients with 21-hydroxylase deficiency displaying a phenotype compatible with the hypermobility type of Ehlers Danlos syndrome. The genetic defect is due to the monoallelic presence of a
CYP21A2
deletion extending into the gene encoding tenascin X (
TNXB
), a connective tissue extracellular matrix protein. The result is a chimeric
TNXA/TNXB
gene causing tenascin-X haploinsufficiency. The prevalence of CAH-X was estimated to be around 14–15% in large cohorts of patients with 21-hydroxylase deficiency. However, population studies are still scarce and the clinical picture of the syndrome has yet to be fully defined. In this review, we discuss the current knowledge regarding the genetic and clinical profile of the CAH-X syndrome. |
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ISSN: | 1177-1062 1179-2000 |
DOI: | 10.1007/s40291-022-00588-0 |