J Neurol (1999) 246 [Suppl 2]: II/1–II/5 © Steinkopff Verlag 1999 I. Litvan Clinical features differentiating patients D. A. Grimes A. E. Lang with postmortem confirmed progressive J. Jankovic A. McKee supranuclear palsy and corticobasal M. Verny degeneration K. Jellinger K. R. Chaudhuri R. K. B. Pearce Abstract Progressive supranuclear symmetric parkinsonism, vertical I. Litvan, M.D. (Y) Neuropharmacology Unit palsy (PSP) and corticobasal degenera- supranuclear gaze palsy, speech and Defense & Veteran Head Injury Program tion (CBD) are often clinically con- frontal lobe-type features, CBD Henry M. Jackson Foundation fused with each other because they patients presented with lateralized Federal Building, Room 714 share a rapid disease progression, motor (e.g., parkinsonism, dystonia or Bethesda, Maryland 20892-9130, USA email:
[email protected] parkinsonism that responds poorly or myoclonus) and cognitive signs (e.g., transiently to levodopa therapy, and ideomotor apraxia, aphasia or alien D. A. Grimes · A. E. Lang associated signs (e.g., ocular abnormal- limb). On the other hand, CBD patients The Toronto Hospital Movement Disorders ities, pyramidal signs and cognitive presenting with an alternate phenotype Centre Toronto, Canada involvement). To improve the accuracy characterized by early severe frontal in diagnosing these disorders, this dementia and bilateral parkinsonism J. Jankovic study examined the clinical features of were generally misdiagnosed. PSP Department of Neurology 51 patients pathologically diagnosed patients without