18F-NaF PET Demonstrating Unusual Focal Tracer Activity in the Brain

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A 60-year-old man with enlarged prostate, hypertension, and diabetes was referred for 18F-NaF PET/CT to evaluate possible metastatic lesions. The patient appeared asymptomatic on the day of the study, without any signs indicating stroke. Patient also had no known history of malignancy or cerebrovascular disease. He had mild elevation of the prostate-specific antigen level, and biopsy of his prostate was not performed. Patient had long-standing history of chronic back pain and abdominal pain. The PET bone scan demonstrated a large area of very intense tracer uptake in the brain. A subsequent brain MRI revealed prior stroke in the same area.

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