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Am J Med Genet A ; 194(9): e63642, 2024 09.
Artículo en Inglés | MEDLINE | ID: mdl-38711237

RESUMEN

The autosomal dominant Okur-Chung neurodevelopmental syndrome (OCNDS: OMIM #617062) is a rare neurodevelopmental disorder first described in 2016. Features include developmental delay (DD), intellectual disability (ID), behavioral problems, hypotonia, language deficits, congenital heart abnormalities, and non-specific dysmorphic facial features. OCNDS is caused by heterozygous pathogenic variants in CSNK2A1 (OMIM *115440; NM_177559.3). To date, 160 patients have been diagnosed worldwide. The number will likely increase due to the growing use of exome sequencing (ES) and genome sequencing (GS). Here, we describe a novel OCNDS patient carrying a CSNK2A1 variant (NM_177559.3:c.140G>A; NP_808227.1:p.Arg47Gln). Phenotypically, he presented with DD, ID, generalized hypotonia, speech delay, short stature, microcephaly, and dysmorphic features such as low-set ears, hypertelorism, thin upper lip, and a round face. The patient showed several signs not yet described that may extend the phenotypic spectrum of OCNDS. These include prenatal bilateral clubfeet, exotropia, and peg lateral incisors. However, unlike the majority of descriptions, he did not present sleep disturbance, seizures or gait difficulties. A literature review shows phenotypic heterogeneity for OCNDS, whether these patients have the same variant or not. This case report is an opportunity to refine the phenotype of this syndrome and raise the question of the genotype-phenotype correlation.


Asunto(s)
Quinasa de la Caseína II , Trastornos del Neurodesarrollo , Niño , Humanos , Masculino , Quinasa de la Caseína II/genética , Discapacidades del Desarrollo/genética , Discapacidades del Desarrollo/patología , Secuenciación del Exoma , Predisposición Genética a la Enfermedad , Heterocigoto , Discapacidad Intelectual/genética , Discapacidad Intelectual/patología , Hipotonía Muscular/genética , Hipotonía Muscular/patología , Mutación , Trastornos del Neurodesarrollo/genética , Trastornos del Neurodesarrollo/patología , Trastornos del Neurodesarrollo/diagnóstico , Fenotipo
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