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Arch Neurol. 2008 Apr;65(4):506-13. doi: 10.1001/archneur.65.4.506.

Parietal lobe deficits in frontotemporal lobar degeneration caused by a mutation in the progranulin gene.

Author information

1
Dementia Research Centre, Institute of Neurology, University College London, London, England.

Abstract

OBJECTIVE:

To describe the clinical, neuropsychologic, and radiologic features of a family with a C31LfsX35 mutation in the progranulin gene CCDS11483.1).

DESIGN:

Case series.

PATIENTS:

A large British kindred (DRC255) with a PGRN mutation was assessed. Affected individuals presented with a mean age of 57.8 years (range, 54-67 years) and a mean disease duration of 6.1 years (range, 2-11 years).

RESULTS:

All patients exhibited a clinical and radiologic phenotype compatible with frontotemporal lobar degeneration based on current consensus criteria. However, unlike sporadic frontotemporal lobar degeneration, parietal deficits, consisting of dyscalculia, visuoperceptual /visuospatial dysfunction, and/or limb apraxia, were a common feature, and brain imaging showed posterior extension of frontotemporal atrophy to involve the parietal lobes. Other common clinical features included language output impairment with either dynamic aphasia or nonfluent aphasia and a behavioral syndrome dominated by apathy.

CONCLUSION:

We suggest that parietal deficits may be a prominent feature of PGRN mutations and that these deficits may be caused by disruption of frontoparietal functional pathways.

PMID:
18413474
PMCID:
PMC2578869
DOI:
10.1001/archneur.65.4.506
[Indexed for MEDLINE]
Free PMC Article

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