Journal
CLINICAL GENETICS
Volume 74, Issue 1, Pages 54-60Publisher
WILEY
DOI: 10.1111/j.1399-0004.2008.00984.x
Keywords
frontotemporal dementia; genetic counselling; IBM; IBMPFD; VCP
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Funding
- Telethon [GTF04003] Funding Source: Medline
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The acronym IBMPFD denotes a syndrome including inclusion body myopathy, Paget's disease of the bone (PDB) and frontotemporal dementia (FTD) as cardinal features, which is caused by missense mutations in the VCP gene. We studied the clinical characteristics and the histopathological features in two siblings and their mother who presented with adult-onset myopathy and presenile, rapidly progressive FTD. One sibling also showed PDB. Light and electron microscopy performed on muscle biopsies demonstrated degenerative changes with inclusion bodies and abnormal aggregates. Mutation analysis of the VCP gene on affected siblings revealed a heterozygous missense mutation (R155H) in a hot spot. This is the first Italian family with multiple individuals diagnosed as having IBMPFD and carrying the recurrent R155H mutation. The implications for genetic counselling were also discussed, with regard to the procedures that may be offered to families suffering from a multisystem disorder with high risk of cognitive decline.
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