Abstract
A 48-year-old male presented to the emergencydepartment with the chief complaint of intermittentuncontrollable shaking of his left arm. He reportedhaving had a brain tumour resected from the rightfrontoparietal region of his brain approximately 5 yearsearlier. He was admitted to hospital and underwentMRI scan of his brain. The MRI demonstrated a rightfrontoparietal region tumour, which was proven to bea partially resected (i.e. residual) low-grade astrocytoma.The residual tumour was resected without any apparentmotor deficit. Although there was some abatement ofseizure activity, focal motor seizures of the patient’sleft upper extremity did not completely resolve, des-pite anticonvulsant medication at therapeutic levels.Brain positron emission tomography (PET)/CT with18-fluorodeoxyglucose (FDG) was performed. Selectedtomographic slices with and without CT fusion areshown in Figures 1, 2 and 3.What is the salient finding? What is the most likelyexplanation for this pattern of uptake?
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