In addition to FLNA mutations, duplications and deletions in chromosome 5 which includes Periventricular Nodular Heterotopia 3 (PVNH3) and Periventricular Nodular Heterotopia 5 (PVNH5) have been seen in patients with periventricular heterotopia without mutations in other causative genes [137]. Here, FLNA is linked to periventricular nodular heterotopia.