We report a kindred of French/Alsatian origin with symptoms of Gerstmann-Sträussler-Scheinker disease over 3 generations. In the propositus, cerebellar signs and memory disturbance were the presenting features, followed by other neurological manifestations. Biopsy of the cerebral cortex showed numerous multicentric and "kuru"-type amyloid plaques that on immuno-light and electron microscopy stained with antibody to prion protein. Molecular genetic analysis revealed an A117V mutation in the open reading frame of the prion protein gene. Questions as to pathology and spread of this mutation are discussed.
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