Numbers of patients appear far bigger than originally predicted considering that 5% to 25% of focal epilepsies, which is a group of epilepsies that sums up to around 60% of all seizure types, belong to the group of FCD, and at least 30% of those cases show mutations in the mTOR pathway (www.epilepsy.com) [79,100,101]. The gene discussed is MTOR; the disease is fleck corneal dystrophy.