TSPO and neoplasm: Unterrainer and coworkers compared [18F]-GE-180 TSPO PET, [18F]-FET PET, and ce-MRI in 20 consecutively enrolled patients with newly diagnosed (n = 8) or recurrent (n = 12) HGGs and correlated imaging findings with both the histological tumor grade (according to the WHO 2016 classification) and molecular profiling [23].