title: DAT imaging in drug-induced and psychogenic parkinsonism.
abstract: Parkinson's syndrome (PS) is frequently encountered in disorders associated with prominent degeneration of the nigrostriatal pathway as in Parkinson's disease, multisystem atrophy, and progressive supranuclear palsy (presynaptic PS). Drug-induced parkinsonism, a common, underdiagnosed health problem and psychogenic parkinsonism are causes of Parkinson's syndrome which, evidence suggests, occurs without degeneration of nigrostriatal structures. We review clinical features and results of DAT imaging in drug-induced parkinsonism and psychogenic parkinsonism. These two conditions normally give normal striatal DAT imaging results; an abnormal result in either case could exclude both conditions, corroborating a diagnosis of organic parkinsonism in uncertain cases.
authors.affiliation: Parkinson's Disease and Movement Disorders Unit, Neurology Service, Institut Clinic Malaltias del Sistema Nervios, Hospital Clínic Universitari, University of Barcelona, Spain. etolosa@clinic.ub.es
authors.forename: Eduardo
authors.initials: E
authors.lastname: Tolosa
authors.forename: Miguel
authors.initials: M
authors.lastname: Coelho
authors.forename: Marisol
authors.initials: M
authors.lastname: Gallardo
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging*; D003342:Corpus Striatum / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D006801:Humans; D009434:Neural Pathways / Q000000981:diagnostic imaging; D019636:Neurodegenerative Diseases / Q000000981:diagnostic imaging; D010300:Parkinson Disease / Q000000981:diagnostic imaging*; D010302:Parkinson Disease, Secondary / Q000139:chemically induced* / Q000000981:diagnostic imaging / Q000523:psychology; D011602:Psychophysiologic Disorders / Q000000981:diagnostic imaging*; D012680:Sensitivity and Specificity; D013378:Substantia Nigra / Q000000981:diagnostic imaging; D014055:Tomography, Emission-Computed; D015899:Tomography, Emission-Computed, Single-Photon