Journal
NEUROLOGY
Volume 84, Issue 5, Pages 496-499Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1212/WNL.0000000000001204
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Funding
- National Institute for Health Research (NIHR) Newcastle Biomedical Research Unit
- Italian Minister of Health (Ricerca Corrente)
- MRC [MR/L016451/1, G0900652, G0502157, G0400074, G1100540] Funding Source: UKRI
- Medical Research Council [G0502157, G0400074, G0900652, G1100540, MR/L016451/1] Funding Source: researchfish
- National Institute for Health Research [NF-SI-0611-10048] Funding Source: researchfish
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Objective:To investigate whether an increasing load of -amyloid and/or neuritic plaques influences the phenotype, and thus the clinical diagnostic accuracy, of dementia with Lewy bodies (DLB).Methods:A series of 64 subjects with autopsy-proven DLB was studied. Last diagnosis before death was used to determine the clinical diagnostic accuracy of DLB in relation to Lewy body distribution and extent of Alzheimer -amyloid and/or neuritic pathology. DLB pathologic diagnosis was made according to consensus criteria, using -synuclein immunostaining for Lewy body identification. -Amyloid immunostaining was used for quantifying -amyloid deposits. The Consortium to Establish a Registry for Alzheimer's Disease criteria and Braak stage were applied for semiquantitative grading of neuritic plaque and neurofibrillary tangle pathology.Results:Overall clinical diagnostic accuracy for the entire DLB cohort was high (80%), reflecting the high prevalence of core clinical features (fluctuations [81%], parkinsonism [77%], visual hallucinations [70%]). Lower frequencies of core clinical features of DLB, resulting in lower accuracy of its clinical diagnosis, were associated with decreasing Lewy body distribution (p < 0.0001) and with increasing neuritic plaque pathology (p = 0.035), but not with the number of -amyloid plaque deposits.Conclusions:The likelihood of occurrence of the DLB clinical syndrome is positively related to the extent of Lewy body pathology and negatively related to the severity of Alzheimer neuritic pathology, while -amyloid load has no effect.
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