FOLH1 and oligodendroglioma: Twelve patients with HGG (glioblastoma n = 6, oligodendroglioma n = 1), or BM (lung- n = 4, breast cancer n = 1), underwent PET-MRI after intravenous [68Ga]Ga-PSMA-11 injection (1.5 MBq/kg), followed by image-guided biopsy sampling during (re-)resection surgery.