Clinicopathological and genetic correlates of frontotemporal lobar degeneration and corticobasal degeneration
Objective To correlate clinical diagnosis and genetic features with different pathological substrates in patients with frontotemporal lobar degeneration (FTLD) and corticobasal degeneration (CBD). Methods 32 cases with pathological proven FTLD or CBD were selected. Patients were classified clinicall...
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Published in | Journal of neurology Vol. 255; no. 4; pp. 488 - 494 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Darmstadt
Steinkopff-Verlag
01.04.2008
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Objective
To correlate clinical diagnosis and genetic features with different pathological substrates in patients with frontotemporal lobar degeneration (FTLD) and corticobasal degeneration (CBD).
Methods
32 cases with pathological proven FTLD or CBD were selected. Patients were classified clinically as frontotemporal dementia (FTD), progressive nonfluent aphasia (PNFA), semantic dementia (SD), CBD or FLTD with motor neuron disease (FLTDMND). Coding exons 1 and 9–13 of
MAPT
and exons 0–12 of the
PGRN
gene were screened by direct sequencing. Regarding the neuropathological findings, cases were classified as tau-positive, ubiquitinpositive tau-negative (FTLD-U), neuronal intermediate filaments inclusions disease (NIFID), dementia lacking distinctive histology (DLDH) or CBD.
Results
17 patients were clinically diagnosed with FTD. Ten showed tau pathology, 3 FTLD-U, 1 NIFID and 3 DLDH. All patients clinically classified as FTLD-MND (6 patients) or SD (3 patients) were FTLD-U. Tau-positive pathology was the substrate of the three patients with PNFA. All three patients classified clinically as CBD presented neuropathologic features of CBD. The three individuals with familial history of early onset FTD and tau-positive pathology carried the P301L mutation in the
MAPT
gene. One out of 3 cases with FTLD-U and intranuclear inclusions carried a mutation in the
PGRN
gene.
Conclusions
We found that pathology underlying sporadic FTD is heterogeneous and not predictable.
MAPT
mutations and clinical diagnosis of PNFA and CBD were associated with tau-positive pathology. The presence of signs of lower MND and SD correlated with FTLD-U.A genetic study of
MAPT
is only recommended when familial history of early onset DFT is present. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0340-5354 1432-1459 |
DOI: | 10.1007/s00415-008-0565-8 |