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Enhancing pretectal lesion causing Parinaud syndrome (sagittal MRI)

This 25-year-old man had light-near dissociation, convergence-retraction nystagmus, and impaired upgaze. Biopsy showed sarcoidosis. (Contributed by Dr. Jason Barton.)

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Associated Disorders

  • Ataxia-telangiectasia
  • Progressive supranuclear palsy