Temporal Changes in 18 F-FDG PET/CT in Familial Neuronal Intranuclear Inclusion Disease, Based on the Clinical...

Area of Science:

• Neurology
• Nuclear Medicine
• Neuroimaging

Background:

• Neuronal intranuclear inclusion disease (NIID) is a rare neurodegenerative disorder.
• Understanding the dynamic changes in NIID is crucial for diagnosis and management.

Purpose of the Study:

• To investigate the temporal changes observed in 18F-FDG PET/CT imaging in patients with NIID.
• To correlate these imaging findings with electroencephalography (EEG) and magnetic resonance imaging (MRI) data.

Main Methods:

• Utilized 18F-FDG PET/CT scans to assess glucose metabolism in the brain.
• Correlated PET findings with simultaneous EEG recordings.
• Compared PET results with MRI diffusion and structural changes over time.

Main Results:

• Initial encephalitis-like episodes in NIID showed hypermetabolism on PET, correlating with EEG abnormalities.
• Affected brain regions later exhibited hypometabolism and diffusion changes on MRI.
• Chronic NIID cases demonstrated diffuse hypometabolism linked to MRI-evident atrophy and EEG-confirmed cerebral dysfunction.

Conclusions:

• This study presents the first report of temporal changes in 18F-FDG PET/CT in NIID.
• 18F-FDG PET/CT imaging appears to reflect disease activity in NIID.
• PET findings show a strong correlation with EEG alterations, aiding in the assessment of NIID progression.