title: Delusional misidentification syndrome and other unusual delusions in advanced Parkinson's disease.
abstract: BACKGROUND
  Unusual delusional syndromes are rare protean diseases with speculative etiopathogenic mechanisms.
  
  
  METHODS
  Seven consecutive patients with advanced PD were evaluated over a 15-year period at the Movement Disorders Unit in the Neurology Service, Hospital de Clínicas, Federal University of Paraná, and the Paraná State Parkinson's Patients Association.
  
  
  RESULTS
  We describe advanced Parkinson's disease patients presenting with unusual delusional syndromes, including cases of Ekbom, Othello, Capgras' and Diogenes syndromes, reduplicative paramnesia and mirrored-self misidentification.
  
  
  CONCLUSIONS
  There are a few isolated reports of unusual neuropsychiatric disorders in patients with PD. We believe that these syndromes associated with advanced PD in elderly patients presenting with cognitive impairment and polypharmacy are probably often underestimated. Neurologists should be aware for these rare and treatable conditions.
authors.affiliation: Movement Disorders Unit, Neurology Service, Hospital de Clínicas, Federal University of Paraná, Curitiba, PR, Brazil.
authors.forename: Adriana
authors.initials: A
authors.lastname: Moro
authors.forename: Renato Puppi
authors.initials: RP
authors.lastname: Munhoz
authors.forename: Mariana
authors.initials: M
authors.lastname: Moscovich
authors.forename: Walter O
authors.initials: WO
authors.lastname: Arruda
authors.forename: Hélio A G
authors.initials: HA
authors.lastname: Teive
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002194:Capgras Syndrome / Q000150:complications / Q000175:diagnosis / Q000523:psychology; D063726:Delusional Parasitosis / Q000150:complications / Q000175:diagnosis / Q000523:psychology; D003702:Delusions / Q000150:complications* / Q000175:diagnosis* / Q000523:psychology; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000150:complications* / Q000175:diagnosis* / Q000523:psychology; D013577:Syndrome