Reported by ClinVar to cause familial febrile seizures (https://www.ncbi.nlm.nih.gov/clinvar/variation/6368/). In ClinVar this variant is reported as “pathogenic” by OMIM. However, it is classified as “uncertain significance” by GeneDx. OMIM’s submission refers to Singh et al 2009 (https://www.ncbi.nlm.nih.gov/pubmed/19763161), where this variant was observed in one of 92 patients with childhood febrile seizures.
This patient was Hispanic/Latino; according to ExAC data, this variant is rare in all ancestries tested (less than 1 in 1,000 carry it) including Latino (http://exac.broadinstitute.org/variant/2-167168083-T-C). The statistical significance of Singh et al’s observation is unclear, and may weak or absent.