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PET findings of the tumor. 11C-Methionine PET showed high uptake by the tumor (arrow), particularly from the medulla oblongata to the spinal cord at the C1 level, indicating spinal astrocytoma (A). 18F-Fluoro-deoxy-glucose (FDG) PET showed generally low FDG uptake by the tumor (arrowhead), indicating low malignancy (B).
