Background: Multiple episodic ataxia phenotypes and genotypes have been described.
Objective: To describe a new episodic ataxia syndrome.
Design: Genomewide linkage analysis with dense single nucleotide polymorphism arrays.
Setting: University clinic. Patients Family with lifelong episodes of ataxia and normal interictal examination results.
Results: Suggestive linkage (logarithm of odds score, 3.27) to a 10-centimorgan region on chromosome 19q13.
Conclusion: A new dominantly inherited episodic ataxia syndrome is linked to chromosome 19q.