Among autosomal-dominant SCAs associated with non-coding microsatellite pathological expansions, a heterozygous GAA trinucleotide expansion within the intron 1 of the fibroblast growth factor 14 (FGF14) gene has been identified in patients with late-onset spinocerebellar ataxia (SCA27B—OMIM #620174) [95]. The gene discussed is FGF14; the disease is late-onset spinocerebellar ataxia 27b.