title: Clinical features of drug-induced parkinsonism based on [18F] FP-CIT positron emission tomography.
abstract: Drug-induced parkinsonism (DIP) is the common cause of parkinsonism. It is difficult to make a differentiation between DIP and Parkinson's disease (PD) because there are no notable differences in the clinical characteristics between the two entities. In this study, we examined the relationship between the characteristics of [(18)F] fluorinated-N-3-fluoropropyl-2-β-carboxymethoxy-3-β-(4-iodophenyl)nortropane (FP-CIT) positron emission tomography (PET) images and clinical features in DIP patients. We retrospectively studied 76 patients with DIP who underwent [(18)F] FP-CIT PET. We also enrolled 16 healthy controls who underwent it. We compared the clinical characteristics between the DIP patients with normal [(18)F] FP-CIT PET scans and those with abnormal ones. Symmetric parkinsonism was more frequent in the patients with normal [(18)F] FP-CIT PET scans as compared with those with abnormal ones. Interval from drug intake to onset of parkinsonism was longer in the patients with abnormal [(18)F] FP-CIT PET scans as compared with those with normal ones. A semi-quantitative analysis showed that specific to non-specific binding ratios in the putamen was lower in the patients with abnormal [(18)F] FP-CIT PET scans as compared with those with normal ones and the age-matched control group. Our results suggest that symmetric parkinsonism was more prevalent, and the duration of drug exposure before the onset of parkinsonism was shorter in the patients with normal [(18)F] FP-CIT PET scans as compared with those with abnormal ones.
authors.affiliation: Department of Neurology, Chung-Ang University College of Medicine, Seoul, Korea.
authors.forename: Hae-Won
authors.initials: HW
authors.lastname: Shin
authors.forename: Jae Seung
authors.initials: JS
authors.lastname: Kim
authors.forename: Minyoung
authors.initials: M
authors.lastname: Oh
authors.forename: Sooyeoun
authors.initials: S
authors.lastname: You
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Kim
authors.forename: Juyeon
authors.initials: J
authors.lastname: Kim
authors.forename: Mi-Jung
authors.initials: MJ
authors.lastname: Kim
authors.forename: Sun Ju
authors.initials: SJ
authors.lastname: Chung
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001921:Brain / Q000000981:diagnostic imaging* / Q000503:physiopathology; D001931:Brain Mapping; D005260:Female; D005462:Fluorine Radioisotopes; D006801:Humans; D008297:Male; D008875:Middle Aged; D010302:Parkinson Disease, Secondary / Q000139:chemically induced* / Q000000981:diagnostic imaging* / Q000503:physiopathology; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014326:Tropanes
chemical_list: D005462:Fluorine Radioisotopes; D019275:Radiopharmaceuticals; D014326:Tropanes; C087552:2-carbomethoxy-8-(3-fluoropropyl)-3-(4-iodophenyl)tropane