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Ann Neurol. 2005 Mar;57(3):429-34.

A mutant PSEN1 causes dementia with Lewy bodies and variant Alzheimer's disease.

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  • 1Department of Neurology, Nishi-Ojiya National Hospital, Ojiya, Japan.


We report early-onset parkinsonism and dementia of 18 years' duration in a 52-year-old man whose grandfather and father had suffered from a similar neurological disease. In this patient, we found neuronal loss in various brain regions including the substantia nigra and cerebral cortex, Lewy bodies, cotton wool plaques, corticospinal tract degeneration, cerebral amyloid angiopathy, and a novel three-base pair deletion in exon 12 of the presenilin-1 (PSEN1) gene. We considered that the mutant PSEN1 might play an important role in the pathogenetic process of both aggregation of alpha-synuclein into Lewy bodies and deposition of beta-amyloid into cotton wool plaques.

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