A diagnosis of<unk>  <unk>  may be based on a thorough medical exam; the presence of signs and symptoms; imaging studies; various laboratory tests; and an evaluation of the family history. MRI of the brain may show characteristics of<unk> , such as specific changes in the size of affected parts of the brain. This is more likely as the disease progresses; it is possible to have<unk>  and have a normal brain MRI (especially within the first year of symptom onset). Hereditary<unk>  may be suspected based on having a family history, and may be diagnosed by genetic testing (when available) for the condition suspected or known to be present in the family. Sporadic<unk>  may be diagnosed if hereditary forms of<unk> , and other conditions associated with<unk> , have been ruled out.
Olivopontocerebellar atrophy
Cerebellar abiotrophy
Cerebellar hypoplasia
Pontocerebellar hypoplasia
Coprolalia
Cerebellar agenesis
Dentatorubral–pallidoluysian atrophy
Harding ataxia