FMR1 and fragile X-associated tremor/ataxia syndrome: Until recently, FXTAS had been observed only in carriers of an FMR1 premutation (55-200 CGG repeats); however the disorder has now been described in individuals carriers of an intermediate allele (45-54 CGG repeats) as well as in a subject with a full mutation with mosaicism.Here, we report on molecular and clinical data of a male FMR1 mosaic individual with full and premutation alleles.