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The pattern of FP-CIT PET in pure white matter hyperintensities-related vascular parkinsonism.

Abstract：

OBJECTIVES:To determine whether vascular parkinsonism (VaP) patients with visually normal dopamine transporter (DAT) scans have presynaptic dopaminergic depletion. METHODS:We enrolled 23 VaP patients who had parkinsonism, relevant diffuse subcortical white matter hyperintensities (WMH), and visually normal DAT scans, 23 Parkinson's disease (PD) patients, and 31 control subjects. By quantitatively analyzing 18F-N-(3-fluoropropyl)-2β-carbon ethoxy-3β-(4-iodophenyl) nortropane (18F-FP-CIT) positron emission tomography, we compared the pattern of striatal DAT availability among groups. The discriminatory power of striatal DAT availability to differentiate VaP patients from control subjects or PD patients was assessed using receiver operating characteristics (ROC) analyses. Additionally, correlation analysis was performed to determine whether WMH severity or Unified Parkinson Disease Rating Scale Part III (UPDRS-III) score is related to presynaptic dopaminergic depletion in VaP. RESULTS:VaP patients exhibited decreased DAT availability in all striatal subregions, including posterior putamen, compared to control subjects. VaP patients and control subjects had similar patterns of anteroposterior and ventrodorsal DAT gradients in caudate and putamen level, but VaP patients exhibited significantly different patterns at putamen level, relative to PD patients. The severity of periventricular WMH was significantly correlated with all substriatal DAT availability in VaP, but not with UPDRS-III scores. The ROC analysis showed that DAT availability in caudate and posterior putamen had a fair discriminatory power when differentiating VaP patients from control subjects. CONCLUSIONS:This study demonstrates that VaP patients with WMH exhibited diffusely decreased DAT availability without any specific regional gradients of DAT patterns distinct from either control subjects or PD patients.

journal_name

Parkinsonism Relat Disord

journal_title

Parkinsonism & related disorders

authors

Lee YH,Lee S,Chung SJ,Yoo HS,Jung JH,Baik K,Ye BS,Sohn YH,Yun M,Lee PH

doi

10.1016/j.parkreldis.2020.11.002

subject

Has Abstract

pub_date

2021-01-01 00:00:00

pages

1-6

eissn

1353-8020

issn

1873-5126

pii

S1353-8020(20)30852-X

journal_volume

82

pub_type

杂志文章

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