title: Isolated Horner syndrome and syrinx of the cervical spinal cord.
abstract: OBJECTIVE
  To alert ophthalmologists to the possibility of a spinal cord lesion in individuals with Horner syndrome and no neurologic symptoms.
  
  
  METHODS
  Observational case report.
  
  
  METHODS
  Neuro-ophthalmic and neuroimaging assessment of a 16-year-old man with an isolated Horner syndrome localizing to a first- or second-order neuron.
  
  
  RESULTS
  With magnetic resonance imaging, a syrinx of the cervical spinal cord extending from C5 to C7 was found. No Chiari malformation was present.
  
  
  CONCLUSIONS
  Patients with an isolated Horner syndrome localizing to a first- or second-order sympathetic neuron should undergo magnetic resonance imaging of the head, neck, spinal cord, and chest to investigate for possible origins. An isolated Horner syndrome may be the presenting manifestation of a cervical syrinx.
authors: Department of Ophthalmology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA. pomer010@umn.edu
authors: Howard
authors: H
authors: Pomeranz
mesh_terms: D000293:Adolescent; D002574:Cervical Vertebrae; D006732:Horner Syndrome / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013116:Spinal Cord / Q000473:pathology*; D013595:Syringomyelia / Q000175:diagnosis*