Double gonosomal mosaicism as an unusual hereditary mechanism in familial GRIN2A-related disorder.

Abstract excerpt

We aim to describe double gonosomal mosaicism in the GRIN2A gene in a mother who passed on two different pathogenic variants at the same nucleotide to her two affected children. We studied a boy with epilepsy and intellectual disability, along with his sister and mother who exhibited language impairment and learning difficulties without epilepsy. We identified in the proband a splice-site variant in GRIN2A...

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