The mean age of onset of epilepsy was 8 years (range 0.3–28 years) and the mean duration of epilepsy (age of onset of habitual seizures until most recent seizure) was 45 years (range 2–86 years); there was a positive correlation between duration of epilepsy and the field fraction of GFAP in the VL (p < 0.05) and the AV (p < 0.05). This evidence concerns the gene GFAP and epilepsy.