title: [Usefulness of apraclonidine in the diagnosis of Horner syndrome].
abstract: METHODS
  We present four cases: two males with Horner Syndrome, who were diagnosed by means of apraclonidine 0.5% and cocaine 4% tests respectively. Two children with anisocoria, one of whom had Horner Syndrome confirmed with apraclonidine 1% and the other, in whom an apraclonidine test ruled out this syndrome but in whom pilocarpine 0.125% confirmed Adie's pupil.
  
  
  CONCLUSIONS
  Apraclonidine drops (1% and 0.5%) may aid in the diagnosis of Horner Syndrome and are easier to obtain than cocaine.
authors.affiliation: Servicio de Oftalmología, Hospital Universitario Miguel Servet, Zaragoza, España. aperezinigo@hotmail.com
authors.forename: M A
authors.initials: MA
authors.lastname: Pérez-Iñigo
authors.forename: I
authors.initials: I
authors.lastname: González
authors.forename: F J
authors.initials: FJ
authors.lastname: Fernández
authors.forename: S
authors.initials: S
authors.lastname: Díaz
authors.forename: C
authors.initials: C
authors.lastname: Ferrer
authors.forename: E
authors.initials: E
authors.lastname: Alias
authors.forename: F M
authors.initials: FM
authors.lastname: Honrubia
mesh_terms: D000316:Adrenergic alpha-Agonists / Q000494:pharmacology; D000328:Adult; D015875:Anisocoria / Q000175:diagnosis; D001720:Birth Injuries / Q000150:complications; D001917:Brachial Plexus / Q000293:injuries; D003000:Clonidine / Q000031:analogs & derivatives* / Q000494:pharmacology; D003042:Cocaine; D003937:Diagnosis, Differential; D005260:Female; D006732:Horner Syndrome / Q000175:diagnosis*; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000601:surgery; D010862:Pilocarpine; D011183:Postoperative Complications / Q000175:diagnosis / Q000209:etiology; D013899:Thoracic Neoplasms / Q000601:surgery; D015845:Tonic Pupil / Q000175:diagnosis
chemical_list: D000316:Adrenergic alpha-Agonists; D010862:Pilocarpine; C016986:apraclonidine; D003042:Cocaine; D003000:Clonidine