Nevada syndrome
NEVADA (Nevus Epidermicus Verrucosus with AngioDysplasia and Aneurysms) syndrome is a rare, life-threatening, cutaneous disease characterized by a keratinocytic epidermal nevus presenting thick, hystrix-like, white or brownish hyperkeratosis associated with multiple extracutaneous vascular malformations, including angiodysplasia that involves large-vessel arteriovenous shunts that may be fatal during the neonatal period.