NeuroImage. Clinical · 2018
Hypometabolism of the posterior cingulate cortex is not restricted to Alzheimer's disease.
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Scheltens Nienke M E, van der Weijden Kars, Adriaanse Sofie M, van Assema Danielle, Oomen Priscilla P, Krudop Welmoed A, Lammertsma Adriaan A, Barkhof Frederik, Koene Teddy, Teunissen Charlotte E, Scheltens Philip, van der Flier Wiesje M, Pijnenburg Yolande A L, Yaqub Maqsood, Ossenkoppele Rik, van Berckel Bart N M
Аннотация
When differential diagnosis of dementia includes both Alzheimer's disease (AD) and the behavioural variant of frontotemporal dementia (bvFTD), distribution of cerebral glucose metabolism as measured using [18F]‑2‑fluoro‑2‑deoxy‑d‑glucose positron emission tomography ([18F]FDG-PET) may be helpful. One important clue for differentiation is the presence of hypometabolism in the posterior cingulate cortex (PCC), usually associated with AD. PCC hypometabolism however, could also be present in bvFTD. Therefore, the specificity of PCC hypometabolism was examined. Based on visual reading PCC hypometabolism was present in 69-73/81 probable AD patients, in 10-16/33 probable bvFTD patients, and in 0-1/22 cognitive normal (CN) subjects. Findings were validated using a PCC to reference tissue [18F]FDG standard uptake value ratio (SUVr) cut-off, which was derived from the receiver operating characteristic (ROC) separating probable AD from CN, resulting in 9-14/33 bvFTD patients having PCC hypometabolism, depending on the reference tissue used. In conclusion, PCC hypometabolism is not restricted to AD.