title: [Unilateral agenesis of the internal carotid artery in childhood: description of a case].
abstract: BACKGROUND
  Unilateral or bilateral agenesis of the internal carotid artery has not often been described in children since it is usually asymptomatic.
  
  
  METHODS
  We describe a case of isolated unilateral agenesis of the internal carotid artery in a child of 20 months old who presented with two episodes of status convulsives, the first after a head injury and the second when he was febrile. The anomaly was a casual finding, diagnosed on cerebral magnetic resonance when there was no signal corresponding to carotid blood flow. It was confirmed by echography-doppler and angiographic magnetic resonance. We also describe the neuro-radiological findings which led to the diagnosis of this anomaly.
  
  
  CONCLUSIONS
  We consider that unilateral agenesis of the carotid artery was a casual finding in this case. The provisional diagnosis may be made when there is absence of vascular signals on conventional magnetic resonance.
authors.affiliation: Servicio de Neurologia Infantil, Hospital Universitario La Paz, Madrid.
authors.forename: M A
authors.initials: MA
authors.lastname: Martínez-Granero
authors.forename: A
authors.initials: A
authors.lastname: Martínez-Bermejo
authors.forename: J
authors.initials: J
authors.lastname: Arcas
authors.forename: T
authors.initials: T
authors.lastname: González
authors.forename: J
authors.initials: J
authors.lastname: Viaño
authors.forename: V
authors.initials: V
authors.lastname: López-Martín
authors.forename: I
authors.initials: I
authors.lastname: Pascual-Castroviejo
mesh_terms: D002343:Carotid Artery, Internal / Q000002:abnormalities*; D002533:Cerebral Angiography; D000013:Congenital Abnormalities / Q000175:diagnosis; D006801:Humans; D007223:Infant; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male