SLC7A5 and glioblastoma: Verhoeven et al. reported 2-(18F)-2-fluoroethyl-l-phenylalanine, 2-(18F)FELP as a new SLC7A5-targeting PET tracer for glioblastoma that is predominantly transported by the SLC7A5 and can discriminate glioblastoma from the radiation necrosis even better than (18F)FET [219,220].