Friedreich's ataxia CT

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mohamadmostafa Jahansouz M.D.[2]

CT scan

Brain CT scan may be helpful in the diagnosis of Friedreich's ataxia. Findings on CT scan suggestive of Friedreich's ataxia include:

• Moderate cerebellar atrophy and an increase in the surface area of the fourth ventricle in two-thirds of the patients
• Atrophy of the number and width of cerebellar sulci
• Olivopontocerebellar atrophy with or without supratentorial atrophy
• Atrophy of transverse diameter and surface area of the:
  • Fourth ventricle
  • Brainstem ratio
  • Cerebellopontine angle cistern
  • Evans' index