title: Intermittent claudication of one cerebral hemisphere.
abstract: A 13-year-old girl consistently developed unilateral sensory and motor symptoms on hyperventilation, suggesting the diagnosis of hysteria. Investigation disclosed hypoplasia of one internal carotid artery and part of the circle of Willis, responsible for compromising blood flow to one hemisphere sufficiently to produce ischemic deficit during hypocapnia.
mesh_terms: D000293:Adolescent; D001921:Brain / Q000098:blood supply*; D002545:Brain Ischemia / Q000175:diagnosis; D002340:Carotid Artery Diseases / Q000175:diagnosis*; D002343:Carotid Artery, Internal; D005260:Female; D006801:Humans; D007383:Intermittent Claudication / Q000175:diagnosis*