Clinical Nuclear Medicine 2014-Sep
Subclinical seizures as a pitfall in 18F-FDG PET imaging of temporal lobe epilepsy.
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A 61-year-old man with history of heroin abuse, hepatitis B, hepatitis C, and hypertension was evaluated for seizures. MRI findings were concerning for temporal epilepsy. A brain 18F-FDG PET study showed a hypermetabolic focus in the left temporal lobe, although the patient was asymptomatic during the scan. Later review of electroencephalography recordings revealed a subclinical seizure during imaging. A whole-body 18F-FDG PET scan performed 4 days later for cancer screening purposes, during which the electroencephalography tracings were normal, showed no abnormal metabolic activity in the brain.
