Brain FDG PET for the Etiological Diagnosis of Clinically Uncertain Cognitive Impairment During Delirium in Remission

BACKGROUND: Positron emission tomography (PET) of the brain with 2-[F-18]-fluoro-2-deoxy-D-glucose (FDG) is widely used for the etiological diagnosis of clinically uncertain cognitive impairment (CUCI). Acute full-blown delirium can cause reversible alterations of FDG uptake that mimic neurodegenerative disease.

OBJECTIVE: This study tested whether delirium in remission affects the performance of FDG PET for differentiation between neurodegenerative and non-neurodegenerative etiology of CUCI.

METHODS: The study included 88 patients (82.0±5.7 y) with newly detected CUCI during hospitalization in a geriatric unit. Twenty-seven (31%) of the patients were diagnosed with delirium during their current hospital stay, which, however, at time of enrollment was in remission so that delirium was not considered the primary cause of the CUCI. Cases were categorized as neurodegenerative or non-neurodegenerative etiology based on visual inspection of FDG PET. The diagnosis at clinical follow-up after ≥12 months served as ground truth to evaluate the diagnostic performance of FDG PET.

RESULTS: FDG PET was categorized as neurodegenerative in 51 (58%) of the patients. Follow-up after 16±3 months was obtained in 68 (77%) of the patients. The clinical follow-up diagnosis confirmed the FDG PET-based categorization in 60 patients (88%, 4 false negative and 4 false positive cases with respect to detection of neurodegeneration). The fraction of correct PET-based categorization did not differ between patients with delirium in remission and patients without delirium (86% versus 89%, p = 0.666).

CONCLUSION: Brain FDG PET is useful for the etiological diagnosis of CUCI in hospitalized geriatric patients, as well as in patients with delirium in remission.

Medienart:

E-Artikel

Erscheinungsjahr:

2020

Erschienen:

2020

Enthalten in:

Zur Gesamtaufnahme - volume:77

Enthalten in:

Journal of Alzheimer's disease : JAD - 77(2020), 4 vom: 14., Seite 1609-1622

Sprache:

Englisch

Beteiligte Personen:

Mathies, Franziska [VerfasserIn]
Lange, Catharina [VerfasserIn]
Mäurer, Anja [VerfasserIn]
Apostolova, Ivayla [VerfasserIn]
Klutmann, Susanne [VerfasserIn]
Buchert, Ralph [VerfasserIn]

Links:

Volltext

Themen:

0Z5B2CJX4D
Alzheimer’s disease
Delirium
Dementia
Fluorodeoxyglucose F18
Journal Article
Neuroimaging
Positron-emission tomography
Research Support, Non-U.S. Gov't

Anmerkungen:

Date Completed 10.09.2021

Date Revised 10.09.2021

published: Print

Citation Status MEDLINE

doi:

10.3233/JAD-200530

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM314971173