FOLH1 and central nervous system cancer: Indeed, as it also emerged from the review published by Bertagna et al., glioblastomas are more PSMA-avid than gliomas, offering the opportunity to be studied with PSMA-based PET/CT imaging as an alternative to 18F-FLT, and overcoming the limitations of 18F-FDG in studying brain tumors [37,54,55].