FXN and cerebellar ataxia: All 4 patients were subject to routine bloods, B12, folate, thyroid function test, copper, nerve conduction studies, etc. Then all had routine genetic testing for ataxia including spinocerebellar ataxia, Friedreich’s ataxia (Frataxin) Fragile X Associated Tremor/Ataxia syndrome (FRXTA) (Table 2).