Basel-Vanagaite-Smirin-Yosef Syndrome, also known as basel-vanagait-smirin-yosef syndrome, is related to polymicrogyria, bilateral perisylvian, x-linked and polymicrogyria. An important gene associated with Basel-Vanagaite-Smirin-Yosef Syndrome is MED25 (Mediator Complex Subunit 25). Affiliated tissues include eye and brain, and related phenotypes are severe global developmental delay and nevus flammeus of the forehead