Regional metabolic changes in Parkinsonian patients with normal dopaminergic imaging
Identifieur interne : 000F67 ( Main/Exploration ); précédent : 000F66; suivant : 000F68Regional metabolic changes in Parkinsonian patients with normal dopaminergic imaging
Auteurs : Thomas Eckert [États-Unis, Allemagne] ; Andrew Feigin [États-Unis] ; Daniel E. Lewis [États-Unis] ; Vijay Dhawan [États-Unis] ; Steven Frucht [États-Unis] ; David Eidelberg [États-Unis]Source :
- Movement Disorders [ 0885-3185 ] ; 2007-01-15.
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Abstract
Dopaminergic imaging has been found to be normal in approximately 15% of parkinsonian patients enrolled in neuroprotective trials. We used 18F‐fluorodeoxyglucose positron emission tomography (FDG PET) to determine the metabolic basis for this finding. We reviewed scans from 185 patients with clinical signs of Parkinson's disease (PD) who underwent 18F‐fluorodopa PET imaging for diagnostic confirmation. Of this group, 27 patients (14.6%) had quantitatively normal scans; 8 of these patients were additionally scanned with FDG PET. Pattern analysis was performed on an individual scan basis to determine whether the metabolic changes were consistent with classic PD. Computer‐assisted single‐case assessments of the FDG PET scans of these 8 patients did not disclose patterns of regional metabolic change compatible with classical PD or an atypical parkinsonian variant. Similarly, network quantification revealed that PD‐related pattern expression was not elevated in these patients as it was in an age‐ and duration‐matched cohort with classical PD (P < 0.0001). None of these patients developed clinical signs of classical PD or of an atypical parkinsonian syndrome at a follow‐up visit conducted 3 years after imaging. The results suggest that parkinsonian subjects with normal dopaminergic imaging do not have evidence of classical PD or an atypical parkinsonian syndrome. © 2006 Movement Disorder Society
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DOI: 10.1002/mds.21185
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Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2007-01-15">2007-01-15</date><biblScope unit="volume">22</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="167">167</biblScope><biblScope unit="page" to="173">173</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">C5595C2085128FD043698F7099337B2E2CC4DC75</idno><idno type="DOI">10.1002/mds.21185</idno><idno type="ArticleID">MDS21185</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>PET</term><term>Parkinson's disease</term><term>SWEDD</term><term>brain metabolism</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Dopaminergic imaging has been found to be normal in approximately 15% of parkinsonian patients enrolled in neuroprotective trials. We used 18F‐fluorodeoxyglucose positron emission tomography (FDG PET) to determine the metabolic basis for this finding. We reviewed scans from 185 patients with clinical signs of Parkinson's disease (PD) who underwent 18F‐fluorodopa PET imaging for diagnostic confirmation. Of this group, 27 patients (14.6%) had quantitatively normal scans; 8 of these patients were additionally scanned with FDG PET. Pattern analysis was performed on an individual scan basis to determine whether the metabolic changes were consistent with classic PD. Computer‐assisted single‐case assessments of the FDG PET scans of these 8 patients did not disclose patterns of regional metabolic change compatible with classical PD or an atypical parkinsonian variant. Similarly, network quantification revealed that PD‐related pattern expression was not elevated in these patients as it was in an age‐ and duration‐matched cohort with classical PD (P < 0.0001). None of these patients developed clinical signs of classical PD or of an atypical parkinsonian syndrome at a follow‐up visit conducted 3 years after imaging. The results suggest that parkinsonian subjects with normal dopaminergic imaging do not have evidence of classical PD or an atypical parkinsonian syndrome. © 2006 Movement Disorder Society</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>États-Unis</li></country><region><li>État de New York</li></region></list><tree><country name="États-Unis"><region name="État de New York"><name sortKey="Eckert, Thomas" sort="Eckert, Thomas" uniqKey="Eckert T" first="Thomas" last="Eckert">Thomas Eckert</name></region><name sortKey="Dhawan, Vijay" sort="Dhawan, Vijay" uniqKey="Dhawan V" first="Vijay" last="Dhawan">Vijay Dhawan</name><name sortKey="Dhawan, Vijay" sort="Dhawan, Vijay" uniqKey="Dhawan V" first="Vijay" last="Dhawan">Vijay Dhawan</name><name sortKey="Eidelberg, David" sort="Eidelberg, David" uniqKey="Eidelberg D" first="David" last="Eidelberg">David Eidelberg</name><name sortKey="Eidelberg, David" sort="Eidelberg, David" uniqKey="Eidelberg D" first="David" last="Eidelberg">David Eidelberg</name><name sortKey="Feigin, Andrew" sort="Feigin, Andrew" uniqKey="Feigin A" first="Andrew" last="Feigin">Andrew Feigin</name><name sortKey="Feigin, Andrew" sort="Feigin, Andrew" uniqKey="Feigin A" first="Andrew" last="Feigin">Andrew Feigin</name><name sortKey="Frucht, Steven" sort="Frucht, Steven" uniqKey="Frucht S" first="Steven" last="Frucht">Steven Frucht</name><name sortKey="Lewis, Daniel E" sort="Lewis, Daniel E" uniqKey="Lewis D" first="Daniel E." last="Lewis">Daniel E. 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