Hereditary neurocutaneous angioma is characterized by the association of cerebral and cutaneous angiomatous lesions. It has been described in less than 10 families. Clinical manifestations of the cerebral lesions include epilepsy, cerebral hemorrhage, and focal neurological deficit. Transmission is autosomal dominant. The disease is Monarch Disease Ontology id MONDO_0007116 (hereditary neurocutaneous angioma).