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The diagnostic tree for SCA relies on many different tools. The most powerful remains family history, as this can quickly bring a patient to genetic testing. Because most ataxias are sporadic (not due to known inheritable factors), genetic testing does not occur early in the tree. From Zumrova A. Problems and possibilities in the differential diagnosis of syndrome spinocerebellar ataxia. Neuro Endocrinol Lett 2005. 26(2): 98–108.
