Different variants of frontotemporal dementia: a neuropathological and immunohistochemical study.
Histological and immunohistochemical findings in 20 cases of frontotemporal dementias-8 cases of dementia of frontal lobe type (DFT), 7 cases of Pick's disease (PD), and 5 cases of motor neuron disease with dementia (MND/D)-are presented. Common features of all three syndromes were: frontotemporal atrophy, involvement of subcortical nuclei, and swollen chromatolytic cells. Ubiquitin (Ub)-positive and tau-negative inclusions in cortical, hippocampal, and motor neurons were found in MND/D and DFT cases, suggesting a common pathogenesis of MND/D and DFT. MND/D showed the same cytoskeletal alterations in motor nuclei as MND without dementia: Bunina bodies and skein-like, Ub-positive inclusions. DFT differed from PD in the preponderance of histopathological changes in upper cortical layers, the sparseness of chromatolytic cells, and the absence of tau-positive Pick bodies (PBs). There were, however, two transitional cases showing Pick-type histology but no PBs, thus linking DFT and PD. PBs expressed chromogranin B and secretoneurin strongly, but chromogranin A only weakly. They were negative for the 70-kDa heat-shock protein, metallothionein, and glutathione-S-transferase.
Bergmann
M
M
Institute of Clinical Neuropathology, Zentralkrankenhaus Bremen-Ost, Germany.
Kuchelmeister
K
K
Schmid
K W
KW
Kretzschmar
H A
HA
Schröder
R
R
D000328:Adult; D000368:Aged; D001284:Atrophy / Q000276:immunology / Q000473:pathology; D003704:Dementia / Q000276:immunology* / Q000473:pathology*; D005625:Frontal Lobe / Q000276:immunology* / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D016472:Motor Neuron Disease / Q000276:immunology / Q000473:pathology; D013702:Temporal Lobe / Q000276:immunology* / Q000473:pathology*