FGF14 and nervous system disorder: This analysis detected outlier values associated with significant q values indicating possible AAG expansion in intron 1 of FGF14 (chr13(hg38): 102,161,567-102,161,726) in 22 of the 48 patients with ataxia (19/39 families; 49%) but only three out of 32 individuals with other neurological disorders (3/31 families; 10%).