In patients with suspected hereditary ataxia, we identified expansions in loci that had not been assessed as part of routine diagnostic workup within the NHS at the time of recruitment, including ATN1, ATXN2, ATXN3, ATXN7, CACNA1A, FXN, TBP, and HTT (table 3). This evidence concerns the gene FXN and Rare hereditary ataxia.