Adult‐onset Alexander disease with progressive ataxia and palatal tremor

A novel glial fibrillary acidic protein (GFAP) mutation, Y257C, is reported in a patient with adult-onset Alexander disease. This is the oldest reported case with confirmation of a GFAP mutation. Onset was late in the sixth decade. Genetic analysis of the GFAP gene is recommended in cases of progressive ataxia and palatal tremor.