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Cerebral metabolic changes associated with Lyme disease
1Division of Nuclear Medicine, Hospital of the University of Pennsylvania, 110 Donner Building, 3400 Spruce Street, Philadelphia, PA 19104, USA. newberg@oasis.rad.upenn.edu
Nuclear Medicine Communications
|July 19, 2002
Summary
Positron emission tomography (PET) using fluorodeoxyglucose (FDG) revealed brain hypometabolism in Lyme disease patients. Temporal lobe hypometabolism was common, potentially explaining memory issues in these neurological Lyme disease cases.
Area of Science:
- Neuroscience
- Infectious Diseases
- Medical Imaging
Background:
- Neurological symptoms, including memory deficits, are common in Lyme disease.
- No prior positron emission tomography (PET) studies have investigated brain metabolism in Lyme disease patients.
Purpose of the Study:
- To investigate brain metabolism and function in patients with Lyme disease using [(18)F]fluorodeoxyglucose (FDG) PET.
- To identify potential patterns of brain involvement associated with neurological Lyme disease.
Main Methods:
- Utilized FDG PET imaging in 23 patients diagnosed with Lyme disease.
- Two experienced reviewers, blinded to clinical data, evaluated PET scans for cortical and subcortical abnormalities.
Main Results:
- Hypometabolism in the temporal lobes was observed in 74% (17/23) of patients.
- Two patterns emerged: specific temporal lobe hypometabolism or diffuse cortical hypometabolism involving frontal and parietal lobes.
- Temporal lobe involvement correlated with reported memory disturbances.
Conclusions:
- FDG PET imaging may reveal patterns of brain hypometabolism in Lyme disease patients with neurological symptoms.
- Temporal lobe hypometabolism is a notable finding, potentially linked to cognitive impairments.
- While not diagnostic, FDG PET offers insights into brain regions affected by Lyme disease.