Xavier disease (Friedreich's ataxia variant) - Symptoms, Causes, Treatment & Prevention

📅 Updated: April 2026. Xavier disease is a very rare, autosomal‑recessive neuro‑degenerative disorder that shares many clinical features with classic Friedreich’s ataxia (FA) but is caused by distinct genetic changes. The name “Xavier disease” originates from the first family in which the condition was identified (the Xavier family) and is sometimes listed in literature as FA‑variant or Friedreich‑type ataxia with atypical genotype.