Familial epilepsy with anterior polymicrogyria as a presentation of COL18A1 mutations.

This report describes a family of four affected sisters with polymicrogyria, refractory seizures, and intellectual impairment of varying severity with a Lennox-Gastaut phenotype, and complex eye abnormalities where a syndromic diagnosis was not initially made. Whole exome sequencing of two affected sisters followed by filtering for rare and potentially disease causing variants in all genes identified compound heterozygous variants in NM_030582.3 (COL18A1): c.3690G > A: p.(Trp1230*) and NM_030582.3 (COL18A1): c.4063_4064delCT: p.(Leu1355Valfs*72). The two variants co-segregated with the affected individuals in the family. Identification of COL18A1 mutations in individuals with a Lennox-Gastaut phenotype and anterior polymicrogyria but lacking the classical occipital encephalocele expands the COL18A1 clinical spectrum.
PMID: 28602933 [PubMed - as supplied by publisher]

Source: European Journal of Medical Genetics - June 8, 2017 Category: Genetics & Stem Cells Authors: Corbett MA, Turner SJ, Gardner A, Silver J, Stankovich J, Leventer RJ, Derry CP, Carroll R, Ha T, Scheffer IE, Bahlo M, Jackson GD, Mackey DA, Berkovic SF, Gecz J Tags: Eur J Med Genet Source Type: research