title: Dopamine transporter imaging in psychogenic parkinsonism and neurodegenerative parkinsonism with psychogenic overlay: a report of three cases.
abstract: BACKGROUND
  Differentiating psychogenic parkinsonism from neurodegenerative Parkinson's disease (PD) with psychogenic features is a diagnostic challenge.
  
  
  METHODS
  We report a detailed longitudinal clinical description of three cases presenting with suspected psychogenic parkinsonism. Dopamine transporter single-photon emission computed tomography (DAT-SPECT) was used as a supplemental diagnostic study and influenced clinical management.
  
  
  CONCLUSIONS
  DAT-SPECT quantified the integrity of the striatal dopaminergic system in these cases of clinically uncertain parkinsonism and supported clinical decision-making.
authors.affiliation: Johns Hopkins Medical Center, Department of Neurology, Movement Disorders Division, Baltimore, Maryland, United States of America.
authors.forename: Chizoba C
authors.initials: CC
authors.lastname: Umeh
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Szabo
authors.forename: Gregory M
authors.initials: GM
authors.lastname: Pontone
authors.forename: Zoltan
authors.initials: Z
authors.lastname: Mari
keywords: Parkinson's disease; Psychogenic parkinsonism; dopamine transporter imaging; striatal dopaminergic deficit