SCA6 (Spinocerebellar Ataxia Type 6)

The diagnosis of SCA6 rests on the use of molecular genetic testing to detect an abnormal CAG trinucleotide repeat expansion in CACNA1A. Affected individuals have 20 to 33 CAG repeats.

Spinocerebellar ataxia type 6 (SCA6) is a condition characterized by progressive problems with movement. People with this condition initially experience problems with coordination and balance (ataxia).