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Very late‐onset Friedreich's ataxia with minimal GAA1 expansion mimicking multiple system atrophy of cerebellar type

Very late‐onset Friedreich's ataxia (VLOFA) is characterized by symptomatic onset after 40 years of age and, usually, a benign phenotype. We describe a sporadic case with onset at 53 years of age and a novel VLOFA phenotype mimicking multiple system atrophy (MSA) of cerebellar type associated with minimal GAA1 expansion. We detected several atypical features for a diagnosis of MSA, which should alert to the possibility of an inherited ataxia. © 2005 Movement Disorder Society