title: Bilateral internal carotid artery dissection presenting as isolated unilateral Horner syndrome.
abstract: A 52-year-old man developed a unilateral Horner syndrome following a skiing accident. He was otherwise asymptomatic. Neuroimaging with magnetic resonance revealed bilateral internal carotid artery dissections, and he was urgently treated with anticoagulation. Immediate neuroimaging should be performed in any patient with Horner syndrome following trauma, regardless of other symptoms or signs.
authors.affiliation: The Wilmer Eye Institute, The Johns Hopkins Hospital, Baltimore 21287, USA. ademetr1@jhmi.edu
authors.forename: Anna M
authors.initials: AM
authors.lastname: Demetriades
authors.forename: Neil R
authors.initials: NR
authors.lastname: Miller
authors.forename: Daniel C
authors.initials: DC
authors.lastname: Garibaldi
mesh_terms: D020212:Carotid Artery Injuries / Q000209:etiology; D002343:Carotid Artery, Internal; D020215:Carotid Artery, Internal, Dissection / Q000175:diagnosis*; D007839:Functional Laterality; D006732:Horner Syndrome / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012865:Skiing / Q000293:injuries