A Novel Nonsense FMN2 Mutation in Nonsyndromic Autosomal Recessive Intellectual Disability Syndrome

Introduction Genetic causes of the intellectual disability Nonsyndromic Autosomal-Recessive Intellectual Disability Syndrome (MRT47, MIM 616193) are mutations in the recently described FMN2 (formin 2 gene). Case report: A boy with intellectual disability had a novel homozygous nonsense mutation (c.2245C > T/p.Gln749*) leading to a premature stop codon in exon 6 of the FMN2 (NM_001305424) gene detected by Clinical Exome Sequencing (CES). Conclusion: Clinical features of a patient with a novel nonsense FMN2 mutation is presented. We urge the change in the OMIM nomenclature from Mental Retardation, Autosomal Recessive 47 (MRT47, MIM 616193) to 'Nonsyndromic Autosomal-Recessive Intellectual Disability Syndrome'.