TBP and spinocerebellar ataxia type 17: Molecular analysis of the <i>TBP</i> gene demonstrated an allele with 41 repeat suggesting that 41 CAG/CCG <i>TBP</i> repeats could be an allele associated with the full clinical spectrum of SCA17.<h4>Conclusions</h4>The described case with the other similar cases described in the literature suggests that 41 CAG/CAA trinucleotides should be considered as critical threshold in SCA17.