COL4A2 and epilepsy: Altogether, 123 patients, from 73 different families, and 69 different mutations (63 COL4A1 and 6 COL4A2) were identified.8, –, 38 Epilepsy was reported in 55 patients, all analyzed in this study, associated with 44 different mutations (42 for COL4A1 and 2 for COL4A2).8, –, 29 Among published cases with epilepsy, there were 12 of maternal origin, 11 of paternal origin, 8 de novo mutations, and 24 with unknown inheritance.