Polymicrogyria with or Without Vascular-Type Ehlers-Danlos Syndrome, is also known as polymicrogyria with or without vascular-type eds. An important gene associated with Polymicrogyria with or Without Vascular-Type Ehlers-Danlos Syndrome is COL3A1 (Collagen Type III Alpha 1 Chain). Affiliated tissues include skin and cortex, and related phenotypes are seizure and delayed speech and language development