title: Hypnic Headache and Basilar Artery Dolichoectasia.
abstract: BACKGROUND
  Hypnic headache is regarded by most authors as a primary headache, but in some cases it was considered secondary to hypophysis, brain stem, or posterior fossa lesions.
  
  
  METHODS
  We report a case of a 69-year-old woman with a history of a headache that fulfils all International Classification of Headache Disorders-II criteria for hypnic headache, with 2 years of evolution, whose complementary investigation with magnetic resonance and magnetic resonance angiography revealed a dolichoectasia of the basilary artery. She was treated with verapamil with excellent response.
  
  
  CONCLUSIONS
  To the best of our knowledge, this is the first described case of a patient with hypnic headache and a dolichoectasic basilar artery. The relation between these 2 entities is questionable, but we raise some possible explanations for this relationship.
authors.affiliation: *Neurology Department, Serviço de Neurologia, Hospital Santo António, Centro Hospitalar do Porto †Neurology Department, Hospital São João, Porto, Portugal.
authors.forename: Isabel
authors.initials: I
authors.lastname: Moreira
authors.forename: Teresa
authors.initials: T
authors.lastname: Mendonça
authors.forename: José P
authors.initials: JP
authors.lastname: Monteiro
authors.forename: Ernestina
authors.initials: E
authors.lastname: Santos
mesh_terms: D000368:Aged; D005260:Female; D051270:Headache Disorders, Primary / Q000209:etiology / Q000473:pathology*; D006801:Humans; D018810:Magnetic Resonance Angiography; D017286:Polysomnography; D014715:Vertebrobasilar Insufficiency / Q000150:complications / Q000473:pathology*