Several cohorts of MSA-C or sporadic late onset cerebellar ataxia including MSA-C have been screened for FGF14 GAA•TTC repeat expansions.18,36-38 Only one study had previously identified FGF14 GAA≥300 repeat expansions in two patients initially diagnosed clinically as possible MSA.18 Based on the genetic findings and re-evaluation of their phenotype, a final diagnosis of SCA27B was reached for these cases. The gene discussed is FGF14; the disease is multiple system atrophy.