Abstract
The SCA17 clinical phenotype includes characteristics associated with cerebellar and cortical atrophy such as ataxia, dementia, epilepsy, chorea and parkinsonian features. Here we describe the case of a 38-year-old male presenting with ataxia, cognitive impairment and seizures, who was found to carry 43 repeats on one allele of the TATA-binding protein (TBP) gene. Therefore, genetic analysis of TBP gene triplets was performed on the patient's entire family, identifying three asymptomatic carriers of the same allele. A neuroradiological phenotype appeared to segregate with this allele, suggesting that it may play at least a contributory role in the determination of SCA17.
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