FGF14 and cerebellar ataxia: Earlier studies screened patients for GAA expansion with an age of onset ≥30 years.1,3,11 Follow-up reports identified individuals in their twenties who exhibited symptoms of ataxia and tested positive for SCA27B.15,16,21 As a result, this study considered individuals with unresolved ataxia with an age of onset of at least 20 years as eligible participants.