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Axial FLAIR MRI1 (a), MRI2 (b) and PET 18F-FDOPA (c) imaging of an anaplastic IDH-mutant (WHO 2016) astrocytoma, with a SUVmax T/N (tumour/contralateral normal brain tissue uptake) ratio = 1.7 (<1.8) and velocity of diameter expansion between MRI1 and MRI2 of 21 mm (>4 mm per year).
