Cortical Hypometabolism Assessed by a Metabolic Ratio in Parkinson's Disease Primarily Reflects Cognitive Deterioration -[ 18F]FDG- PET
Identifieur interne : 003025 ( Main/Merge ); précédent : 003024; suivant : 003026Cortical Hypometabolism Assessed by a Metabolic Ratio in Parkinson's Disease Primarily Reflects Cognitive Deterioration -[ 18F]FDG- PET
Auteurs : Inga Liepelt [Allemagne] ; Matthias Reimold [Allemagne] ; Walter Maetzler [Allemagne] ; Jana Godau [Allemagne] ; Gerald Reischl [Allemagne] ; Alexandra Gaenslen [Allemagne] ; Heinz Herbst [Allemagne] ; Daniela Berg [Allemagne]Source :
- Movement disorders [ 0885-3185 ] ; 2009.
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Abstract
In Parkinson's disease patients with cognitive deterioration, regional cortical hypometabolism has been observed with [18F]fluorodeoxyglucose-positron emission tomography (FDG-PET). Our aim was to develop a robust method to subsume the overall degree of metabolic deterioration in Parkinson's disease by means of a single index and to investigate which of the clinical features correlates best with hypometabolism. Twenty-two Parkinson's patients (10 demented) and seven controls underwent FDG-PET. A metabolic index (mean relative uptake in typically affected regions) was calculated for each patient and compared with scores for cognition [Mini-mental State Examination (MMSE)], motor performance [Unified Parkinson's Disease Rating Scale (UPDRS III)] and behavior (Neuropsychiatric Inventory). In stepwise linear regression analysis, MMSE (P < 0.001) score showed the only significant effect. Estimated sensitivity and specificity for DSM-IV diagnosis of dementia were high for the metabolic index (MI), with 91 and 100%. Taken together, the presented data indicate that cerebral hypometabolism in Parkinson's disease is primarily associated with cognitive impairment.
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<front><div type="abstract" xml:lang="en">In Parkinson's disease patients with cognitive deterioration, regional cortical hypometabolism has been observed with [<sup>18</sup>
F]fluorodeoxyglucose-positron emission tomography (FDG-PET). Our aim was to develop a robust method to subsume the overall degree of metabolic deterioration in Parkinson's disease by means of a single index and to investigate which of the clinical features correlates best with hypometabolism. Twenty-two Parkinson's patients (10 demented) and seven controls underwent FDG-PET. A metabolic index (mean relative uptake in typically affected regions) was calculated for each patient and compared with scores for cognition [Mini-mental State Examination (MMSE)], motor performance [Unified Parkinson's Disease Rating Scale (UPDRS III)] and behavior (Neuropsychiatric Inventory). In stepwise linear regression analysis, MMSE (P < 0.001) score showed the only significant effect. Estimated sensitivity and specificity for DSM-IV diagnosis of dementia were high for the metabolic index (MI), with 91 and 100%. Taken together, the presented data indicate that cerebral hypometabolism in Parkinson's disease is primarily associated with cognitive impairment.</div>
</front>
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