Episodic ataxia and SCA6 within the same family due to the D302N CACNA1A gene mutation.

Abstract excerpt

Several dominant mutations of CACNA1A gene were associated with at least three different allelic disorders: spino-cerebellar ataxia type 6 (SCA6), episodic ataxia type 2 (EA2), and familial hemiplegic migraine-1 (FHM1). It is generally thought that loss-of-function mutations are associated with EA2, gain-of-function missense mutations with FHM1, and abnormal CAG expansions with SCA6. But, overlapping features,...

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