cingulate island sign

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|image = File:FDG Alzheimer Disease and Dementia with Lewy Bodies.jpg

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|caption = FDG-PET of horizontal cross section brain. Brighter areas indicate higher metabolism, and the cingulate island sign is present in DLB (arrow), unlike Alzheimer's disease (AD) and normal (NC).

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|differential = Dementia with Lewy bodies

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In medicine, the cingulate island sign is a finding on FDG-PET brain scans that metabolism in the posterior cingulate cortex is preserved. It can help to identify dementia with Lewy bodies (DLB) and distinguish it from Alzheimer's disease and other dementias.{{cite journal |vauthors=McKeith IG, Boeve BF, Dickson DW, et al |title=Diagnosis and management of dementia with Lewy bodies: Fourth consensus report of the DLB Consortium |journal=Neurology |volume=89 |issue=1 |pages=88–100 |date=July 2017 |pmid=28592453 |pmc=5496518 |doi=10.1212/WNL.0000000000004058 |type=Review }}{{cite journal |vauthors=Hershey LA, Coleman-Jackson R |title=Pharmacological management of dementia with Lewy dodies |journal=Drugs Aging |volume=36 |issue=4 |pages=309–19 |date=April 2019 |pmid=30680679 |pmc=6435621 |doi=10.1007/s40266-018-00636-7 |type= Review}}