title: Arguing against the proposed definition changes of PD.
abstract: As members of the Lewy Body Dementia Association Scientific Advisory Council, we aim to address some of the issues raised in the article titled "Time to Redefine PD? Introductory Statement of the MDS Task Force on the Definition of Parkinson's Disease." In particular, we suggest that the 1-year rule distinguishing Parkinson's disease dementia from dementia with Lewy bodies is worth maintaining because it serves an important purpose in clinical practice and clinical and basic science research and when helping the lay community understand the complexity of these different clinical phenotypes. Furthermore, we believe that adding an additional diagnostic label, "PD (dementia with Lewy bodies subtype)," will confuse rather than clarify the distinction between dementia with Lewy bodies and PD or PD dementia, and will not improve management or expedite therapeutic development. We present arguments supporting our contentions. © 2016 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society.
authors: Department of Neurology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
authors: Bradley F
authors: BF
authors: Boeve
authors: Departments of Pathology and Neuroscience, Mayo Clinic, Jacksonville, Florida, USA.
authors: Dennis W
authors: DW
authors: Dickson
authors: Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
authors: John E
authors: JE
authors: Duda
authors: Department of Psychiatry and Psychology, Mayo Clinic College of Medicine, Jacksonville, Florida, USA.
authors: Tanis J
authors: TJ
authors: Ferman
authors: Department of Neurosciences, University of California, San Diego, California, USA.
authors: Douglas R
authors: DR
authors: Galasko
authors: Marcus Neuroscience Institute, Florida Atlantic University, Boca Raton, Florida, USA.
authors: James E
authors: JE
authors: Galvin
authors: Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA.
authors: Jennifer G
authors: JG
authors: Goldman
authors: Department of Neurology, Harvard Medical School at Massachusetts General Hospital, Boston, Massachusetts, USA.
authors: John H
authors: JH
authors: Growdon
authors: Department of Neurology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, USA.
authors: Howard I
authors: HI
authors: Hurtig
authors: Department of Neurology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
authors: Daniel I
authors: DI
authors: Kaufer
authors: Department of Radiology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
authors: Kejal
authors: K
authors: Kantarci
authors: Lou Ruvo Center for Brain Health, Cleveland Clinic, Cleveland, Ohio, USA.
authors: James B
authors: JB
authors: Leverenz
authors: Department of Neurology, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.
authors: Carol F
authors: CF
authors: Lippa
authors: Department of Neurology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
authors: Oscar L
authors: OL
authors: Lopez
authors: Institute of Ageing, Newcastle University, Newcastle upon Tyne, UK.
authors: Ian G
authors: IG
authors: McKeith
authors: Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, Maryland, USA.
authors: Andrew B
authors: AB
authors: Singleton
authors: Lewy Body Dementia Association, Lilburn, Georgia, USA.
authors: Angela
authors: A
authors: Taylor
authors: Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA.
authors: Debby
authors: D
authors: Tsuang
authors: Department of Psychiatry, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
authors: Daniel
authors: D
authors: Weintraub
authors: Department of Neurology, University of Washington School of Medicine, Seattle, Washington, USA.
authors: Cyrus P
authors: CP
authors: Zabetian
mesh_terms: D026683:Advisory Committees; D003704:Dementia; D006801:Humans; D020961:Lewy Body Disease; D010300:Parkinson Disease; D010641:Phenotype
keywords: Dementia with Lewy bodies; Parkinson's disease; dementia; parkinsonism