Viewpoint Diagnostic Procedures for Parkinson’s Disease Dementia: Recommendations from the Movement Disorder Society Task Force Bruno Dubois, MD, 1 * David Burn, MD, 2 Christopher Goetz, MD, 3 Dag Aarsland, MD, PhD, 4,5 Richard G. Brown, PhD, 6,7 Gerald A. Broe, HB, BS, 8,9 Dennis Dickson, MD, 10 Charles Duyckaerts, MD, PhD, 11 Jefferey Cummings, MD, 12 Serge Gauthier, MD, 13 Amos Korczyn, MD, MSc, 14 Andrew Lees, FRCP, 15 Richard Levy, MD, PhD, 16 Irene Litvan, MD, 17 Yoshikuni Mizuno, MD, 18 Ian G. McKeith, MD, 19 C. Warren Olanow, MD, 20,21 Werner Poewe, MD, 22 Cristina Sampaio, MD, PhD, 23 Eduardo Tolosa, MD, 24 and Murat Emre, MD 25 1 INSERM-UPMC UMRS 610, Federation of Neurology, AP-HP, Salpe ˆtrie `re Hospital; Universite ´ Paris6, Paris, France 2 Institute for Ageing and Health, Newcastle University, United Kingdom 3 Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA 4 Norwegian Centre for Movement Disorders, Stavanger University Hospital, Stavanger, Norway 5 School of Medicine, University of Bergen, Norway 6 Department of Psychology, King’s College, London, United Kingdom 7 MRC Centre for Neurodegeneration Research, Institute of Psychiatry, King’s College, London, United Kingdom 8 Ageing Research Centre, Prince of Wales Hospital, Randwick, New South Wales, Australia 9 Faculty of Medicine, Prince of Wales Medical Research Institute, University of New South Wales, Randwick, New South Wales, Australia 10 Department of Neuroscience, Mayo Clinic College of Medicine, Jacksonville, Florida, USA 11 Neuropathology Laboratory, Salpetriere Hospital, Paris VI Pierre et Marie Curie University, Inserm U679, Paris, France 12 Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California, USA 13 Alzheimer Disease and Related Disorders Unit, McGill Center for Studies in Aging, Montreal, Quebec, Canada 14 Department of Neurology, Tel-Aviv University, Ramat -Aviv, Israel 15 Department of Neurology, The National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom 16 INSERM U610, Ho ˆpital de la Salpe ˆtrie `re & AP-HP, Ho ˆpital Saint Antoine, Service de Neurologie, Paris, France 17 Movement Disorder Program, Department of Neurology, University of Louisville School of Medicine, Louisville, Kentucky, USA 18 Department of Neurology, Research Institute for Diseases of Old Ages, Juntendo University School of Medicine, Bunkyo-ku, Tokyo, Japan 19 Institute for Ageing and Health, Newcastle University, Newcastle upon Tyne, United Kingdom 20 Department of Neurology, Mount Sinai School of Medicine, New York, USA 21 Department of Neuroscience, Mount Sinai School of Medicine, New York, USA 22 Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria 23 Laboratorio de Farmacologia Clinica e Terapeutica, Faculdade de Medicina de Lisboa e Instituto de Medicina Molecular, Lisboa, Portugal 24 Parkinson’s Disease and Movement Disorders Unit, Neurology Service, Institut Clinic de Neurociences, Hospital Clinic de Barcelona, IDIBAPS, Universitat de Barcelona, CIBERNED, Barcelona, Catalonia, Spain 25 Department of Neurology, Behavioral Neurology and Movement Disorders Unit, I ´ stanbul Faculty of Medicine, I ´ stanbul University, I ´ stanbul, Turkey *Correspondence to: Dr. Bruno Dubois, Neurology Department and Inserm U610, Salpe ˆtrie `re Hospital, 47 Bd de l’Ho ˆpital, Paris 75013, France. E-mail: bruno.dubois@psl.aphp.fr Received 12 March 2007; Revised 3 August 2007; Accepted 16 October 2007 Published online in Wiley InterScience (www.interscience.wiley. com). DOI: 10.1002/mds.21844 Movement Disorders Vol. 22, No. 16, 2007, pp. 2314 –2324 © 2007 Movement Disorder Society 2314