title: Peripheral nerve blocks: a therapeutic alternative for hemicrania continua.
abstract: OBJECTIVE
  A complete response to indomethacin is required for the diagnosis of hemicrania continua (HC). Nevertheless, patients may develop side effects leading to withdrawal of this drug. Several alternatives have been proposed with no consistent effectiveness. Both anaesthetic blocks of peripheral nerves and trochlear corticosteroid injections have been effective in some case reports.
  
  
  METHODS
  Twenty-two patients with HC were assessed in a headache outpatient office. Physical examination included palpation of the supraorbital nerve (SON) and greater occipital nerve (GON) as well as of the trochlear area.
  
  
  RESULTS
  In 14 patients, at least one tender point was detected. Due to indomethacin intolerance, at least one anaesthetic block of the GON or SON, or an injection of corticosteroids in the trochlear area, were performed in nine patients. Four of them were treated with a combination procedure. All these patients experienced total or partial improvement lasting from 2 to 10 months.
  
  
  CONCLUSIONS
  Anaesthetic blocks or corticosteroid injections may be effective in HC patients showing tenderness of the SON, GON or trochlear area.
authors.affiliation: Neurology Department, Hospital Clínico Universitario, Valladolid, Spain. gueneurol@gmail.com
authors.forename: Ángel L
authors.initials: ÁL
authors.lastname: Guerrero
authors.forename: Sonia
authors.initials: S
authors.lastname: Herrero-Velázquez
authors.forename: María L
authors.initials: ML
authors.lastname: Peñas
authors.forename: Patricia
authors.initials: P
authors.lastname: Mulero
authors.forename: María Isabel
authors.initials: MI
authors.lastname: Pedraza
authors.forename: Elisa
authors.initials: E
authors.lastname: Cortijo
authors.forename: Rosa
authors.initials: R
authors.lastname: Fernández
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003391:Cranial Nerves / Q000601:surgery*; D005260:Female; D006261:Headache / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009407:Nerve Block / Q000379:methods*; D009437:Neuralgia / Q000601:surgery*; D010525:Peripheral Nerves / Q000601:surgery; D055815:Young Adult