Evidence map›Paper›PMID 41686159›Full record

ArticleAnnals of clinical and translational neurology2026

FDG-PET Associations With Disease Severity and Outcomes in NMDA-Receptor IgG Autoimmune Encephalitis.

Jonathan K Lee, Jeffrey Lambe, Scott Johnson, Akua Abrah, Jennifer Bullen, Jeffrey A Cohen, Tatchaporn Ongphichetmetha, Amy Kunchok

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Article in Annals of clinical and translational neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

8 authors.

Jonathan K LeeDepartment of Radiology, Diagnostics Institute, Cleveland Clinic, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0002-5955-5145
Jeffrey LambeCleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.
Scott JohnsonDepartment of Radiology, Diagnostics Institute, Cleveland Clinic, Cleveland, Ohio, USA.
Akua AbrahCleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.
Jennifer BullenQuantitative Health Sciences Department, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.
Jeffrey A CohenCleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.
Tatchaporn OngphichetmethaMellen Center for Multiple Sclerosis, Neurological Institute, Cleveland Clinic, Cleveland, Ohio, USA.
Amy KunchokCleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, USA.ORCID https://orcid.org/0000-0002-8387-6491

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPatients with N-methyl-D-aspartate (NMDA) receptor-immunoglobulin G (IgG) autoimmune encephalitis (NMDAR-IgG AE) demonstrate occipital lobe hypometabolism on baseline brain fluorodeoxyglucose-positron emission tomography (bFDG-PET). The goal of this study was to determine whether there is an association between bFDG-PET findings, disease severity, and clinical outcomes in these patients.

methodsThis retrospective analysis included adult patients with NMDAR-IgG AE who underwent bFDG-PET within 3 months of symptom onset. Qualitative and quantitative assessments of bFDG-PET findings were performed. Spearman's correlation analysis was used to evaluate potential associations between bFDG-PET findings and clinical severity at diagnosis and at 1 year using modified Rankin Scale (mRS) and Clinical Assessment Scale for Autoimmune Encephalitis (CASE) scores.

resultsSixteen patients (13 women, 3 men; median age, 29.0 years) were included in the analysis. The median time between symptom onset and bFDG-PET was 5 weeks (interquartile range: 3-8). All patients received immunosuppressive therapy. Qualitative and quantitative assessments demonstrated the highest correlation between occipital lobe hypometabolism and clinical severity at diagnosis (Quantitative: mRS: -0.65 [95% confidence interval (CI): -0.87, -0.22]; CASE: -0.68 [95% CI: -0.88, -0.28]). At 1 year (n = 12), quantitative baseline occipital lobe hypometabolism was correlated with higher mRS scores (-0.71 [95% CI: -0.91, -0.23]).

conclusionsIn patients with NMDAR-IgG AE, occipital lobe hypometabolism on baseline bFDG-PET is correlated with mRS and CASE scores at the time of diagnosis and mRS scores 1 year later, suggesting that bFDG-PET findings correlate with disease severity and longitudinal outcomes. However, studies with larger patient populations are needed to confirm these findings.

Indexed as

Anti-N-Methyl-D-Aspartate Receptor EncephalitisEncephalitisHashimoto DiseasePositron-Emission TomographyAdultFemaleFluorodeoxyglucose F18HumansImmunoglobulin GMaleMiddle AgedRetrospective StudiesSeverity of Illness IndexYoung AdultFluorodeoxyglucose F18Immunoglobulin GClinical Assessment Scale for Autoimmune Encephalitis (CASE) scoresFDG PETNMDAR encephalitis

Identifiers

PMID41686159
PMCPMC13395022

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