Periventricular Nodular Heterotopia 1, also known as heterotopia, periventricular, x-linked dominant, is related to periventricular nodular heterotopia and periventricular nodular heterotopia 8. An important gene associated with Periventricular Nodular Heterotopia 1 is FLNA (Filamin A). Affiliated tissues include cortex and brain, and related phenotypes are short finger and cerebellar hypoplasia