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From the Centro Sclerosi Multipla, Dipartimento di Scienze Cardiovascolari e Neurologiche (Drs. Marrosu, Floris, Costa, Schirru, Spinicci, Mascia, and Cocco) and Dipartimento di Radiologia (Drs. Cherchi and Mura), University of Cagliari, Italy.
* To whom correspondence should be addressed. E-mail: gmarrosu{at}unica.it.
Abstract-- The authors describe four members of a family with a novel P284S presenilin 1 mutation presenting a clinical phenotype characterized by early-onset dementia, paratetraparesis, dysarthria, dysphagia, and marked involvement of brain white matter. The distinctive clinical and MRI findings in the family studied extend the phenotypic spectrum of dementia associated with mutation of the PS1 gene.
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