FOLH1 and glioblastoma: Although preliminary work showed high TBR values in glioblastoma patients (Brighi et al. 2023; Kunikowska et al. 2018, 2020), a recent multicenter study in which different PSMA tracers were applied showed that there was no correlation between tracer uptake and PSMA receptor density on tumor cells of microvessels (Lith et al. 2023).