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Article Abstract
A 59-year-old man with metastatic melanoma and brain metastases underwent brain radiotherapy. Following treatment, he developed neurological symptoms, prompting further evaluation. To assess the treatment response and possibility of Lutetium-177-FAPI therapy, both 18F-FDG PET/CT and 68Ga-FAPI-46 PET/CT scans were performed. The 18F-FDG PET/CT was inconclusive due to posttreatment changes, making it challenging to distinguish between tumor progression and therapy-related alterations. In contrast, the 68Ga-FAPI-46 PET/CT revealed multiple areas of increased FAPI uptake, indicative of viable residual lesions and consistent with MRI findings.
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