Abstract
Aim
To assess the clinical utility of FDG-PET as a diagnostic aid for differentiating Alzheimer’s disease (AD; both typical and atypical forms), dementia with Lewy bodies (DLB), frontotemporal lobar degeneration (FTLD), vascular dementia (VaD) and non-degenerative pseudodementia.
Methods
A comprehensive literature search was conducted using the PICO model to extract evidence from relevant studies. An expert panel then voted on six different diagnostic scenarios using the Delphi method.
Results
The level of empirical study evidence for the use of FDG-PET was considered good for the discrimination of DLB and AD; fair for discriminating FTLD from AD; poor for atypical AD; and lacking for discriminating DLB from FTLD, AD from VaD, and for pseudodementia. Delphi voting led to consensus in all scenarios within two iterations. Panellists supported the use of FDG-PET for all PICOs—including those where study evidence was poor or lacking—based on its negative predictive value and on the assistance it provides when typical patterns of hypometabolism for a given diagnosis are observed.
Conclusion
Although there is an overall lack of evidence on which to base strong recommendations, it was generally concluded that FDG-PET has a diagnostic role in all scenarios. Prospective studies targeting diagnostically uncertain patients for assessing the added value of FDG-PET would be highly desirable.
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Acknowledgements
The procedure for assessing scientific evidence and defining consensual recommendations was funded by the European Association of Nuclear Medicine (EANM) and by the European Academy of Neurology (EAN). We thank the guidelines working group of EAN, particularly Simona Arcuti and Maurizio Leone, for methodological advice.
Funding
This project was funded in part by the European Association of Nuclear Medicine (EANM) and the European Academy of Neurology (EAN).
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Peter Nestor received discounted radiotracer from Piramal for a research study.
Flavio Nobili received personal fees and non-financial support from GE Healthcare, non-financial support from Eli Lilly and grants from Chiesi Farmaceutici.
Cristina Festari declares that she has no conflict of interest.
Daniele Altomare was the recipient of a grant allocated by the European Academy of Neurology (EAN) for data extraction and evidence assessment for the present project.
Jasmine Gandolfo declares that she has no conflict of interest.
Federica Agosta is Section Editor of NeuroImage: Clinical; has received speaker fees from Biogen Idec, Novartis, and Excellence in Medical Education; and receives or has received research support from the Italian Ministry of Health, AriSLA (Fondazione Italiana di Ricerca per la SLA), and the European Research Council. She received personal fees from Elsevier Inc.
Stefania Orini declares that she has no conflict of interest.
Javier Arbizu received grants from Eli Lilly & Company, Piramal and GE Healthcare.
Femke Bouwman declares that she has no conflict of interest.
Alexander Drzezga received grants and non-financial support from Eli Lilly & Company, Siemens and GE Healthcare; he also received non-financial support from Piramal.
Zuzana Walker received grants and tracers, personal fees for consultancy and speaker fees from GE Healthcare.
Ian Law declares that he has no conflict of interest.
Marina Boccardi has received funds from the European Association of Nuclear Medicine (EANM) to perform the evidence assessment and the global coordination of the present project. She has also received research grants from Piramal and served as a paid member of advisory boards for Eli Lilly.
Giovanni B Frisoni is principal investigator of industry-sponsored trials funded by AbbVie, Acadia, Altoida, Amoneta, Araclon, Biogen, Janssen, Novartis and Piramal; has received funding for investigator-initiated trials from GE, Piramal, and Avid–Lilly; and has received speaker fees from a number of pharma and imaging companies.
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This is a review article that does not contain any original study with human participants performed by any of the authors. Ethical approval is shown in each of the quoted original papers.
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Not applicable; this is a review article. Informed consent statement is declared in each of the reviewed papers.
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Nestor, P.J., Altomare, D., Festari, C. et al. Clinical utility of FDG-PET for the differential diagnosis among the main forms of dementia. Eur J Nucl Med Mol Imaging 45, 1509–1525 (2018). https://doi.org/10.1007/s00259-018-4035-y
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DOI: https://doi.org/10.1007/s00259-018-4035-y