title: Tonic pupil and sarcoidosis.
abstract: OBJECTIVE
  To present a case of tonic pupil associated with enhancement in the region of the ciliary ganglion on magnetic resonance imaging in a patient with sarcoidosis.
  
  
  METHODS
  Observational case report.
  
  
  METHODS
  A 52-year-old woman with sarcoidosis had a right pupil exhibiting sectoral palsy to light and light-near dissociation.
  
  
  RESULTS
  Topical administration of 0.1% pilocarpine demonstrated supersensitivity of the right pupillary sphincter muscle. Magnetic resonance imaging (MRI) with contrast revealed enhancement in the region of the right ciliary ganglion.
  
  
  CONCLUSIONS
  Tonic pupil may be a manifestation of sarcoidosis, and in such cases, MRI may show enhancement at the level of the ciliary ganglion. Sarcoidosis should be included in the differential diagnosis of tonic pupil.
authors.affiliation: Department of Ophthalmology, Medical University of South Carolina, Charleston, South Carolina, USA
authors.forename: Esther M
authors.initials: EM
authors.lastname: Bowie
authors.forename: Syndee J
authors.initials: SJ
authors.lastname: Givre
mesh_terms: D001763:Blepharoptosis / Q000209:etiology; D005260:Female; D006801:Humans; D007498:Iris / Q000187:drug effects; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009130:Muscle, Smooth / Q000187:drug effects; D010862:Pilocarpine; D017565:Sarcoidosis, Pulmonary / Q000150:complications*; D012871:Skin Diseases / Q000150:complications; D015845:Tonic Pupil / Q000175:diagnosis / Q000209:etiology*
chemical_list: D010862:Pilocarpine