Regular Paper

Acta Neuropathologica

, Volume 108, Issue 2, pp 121-128

Pathological entity of dementia with Lewy bodies and its differentiation from Alzheimer’s disease

  • Wami MaruiAffiliated withDepartment of Psychiatry, Yokohama City University School of Medicine
  • , Eizo IsekiAffiliated withDepartment of Psychiatry, Yokohama City University School of Medicine Email author 
  • , Masanori KatoAffiliated withSoga Hospital
  • , Hiroyasu AkatsuAffiliated withFukushimura Hospital
  • , Kenji KosakaAffiliated withFukushimura Hospital

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

We reclassified the pathological subtypes of dementia with Lewy bodies (DLB), based on both Lewy pathology and Alzheimer pathology, to clarify the pathological entity of DLB and the boundary between DLB and Alzheimer’s disease (AD) in autopsied cases, using both pathological and immunohistochemical methods. DLB was classified as either limbic type or neocortical type according to the degree of Lewy pathology including Lewy bodies (LB) and LB-related neurites by our staging, and was classified as pure form, common form or AD form according to the degree of Alzheimer pathology including neurofibrillary tangles (NFT) and amyloid deposits by Braak staging. These combined subtypes were lined up on a spectrum, not only with Lewy pathology but also with other DLB-related pathologies including Alzheimer pathology, neuronal loss in the substantia nigra, spongiform change in the transentorhinal cortex and LB-related neurites in the CA2–3 region. In contrast, the Lewy pathology of AD did not meet the stages of Lewy pathology in DLB, and there were scarcely any similarities in other DLB-related pathologies between AD and DLB. In addition, the Lewy pathology of AD had characteristics different from that of DLB, including the coexistence rate of LB with NFT, and the immunohistochemical and immunoelectron microscopic findings of LB and LB-related neurites. These findings suggest that DLB is a distinctive pathological entity that can be differentiated from AD, although it shows some pathological subtypes.

Keywords

Dementia with Lewy bodies Alzheimer’s disease Lewy pathology α-Synuclein Pathological subtypes