Leucine-485 deletion variant of BRAFmay exhibit the severe end of the clinical spectrum of CFC syndrome

Autor: Suzuki-Muromoto, Sato, Miyabayashi, Takuya, Nagai, Koki, Yamamura-Suzuki, Saeko, Anzai, Mai, Takezawa, Yusuke, Sato, Ryo, Okubo, Yukimune, Endo, Wakaba, Inui, Takehiko, Togashi, Noriko, Kikuchi, Atsuo, Niihori, Tetsuya, Aoki, Yoko, Kure, Shigeo, Haginoya, Kazuhiro
Zdroj: Journal of Human Genetics; May 2019, Vol. 64 Issue: 5 p499-504, 6p
Abstrakt: The genotype–phenotype correlation in BRAFvariant in cardio-facio-cutaneous (CFC) syndrome is not clearly defined. Here we report a case with a severe clinical phenotype and a novel BRAFvariant, p.Leu485del. The present case showed severe intellectual disability, impaired awareness, hyperekplexia, involuntary movements, early onset refractory seizures, and delayed myelination on brain magnetic resonance imaging as well as a polycystic and dysplastic kidney, which are previously unreported anomalies in CFC or RAS/mitogen-activated protein kinase syndromes related to BRAFvariant. CFC syndrome, especially caused by BRAFvariant, should be included in the differential diagnosis of patients with developmental and epileptic encephalopathies and hyperekplexia. Furthermore, we need to keep in mind that missense variants or the deletion of Leucine-485 may be associated with severe symptoms.
Databáze: Supplemental Index
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