TSPO and central nervous system cancer: Other radiotracers, including the 18-kDa translocator protein (TSPO)–targeting PET tracer N,N-diethyl-2-[4-(2-18F-fluoroethoxy)phenyl]-5,7-dimethylpyrazolo[1,5-a]pyrimidine-3-acetamide (18F-DPA-714), have been used to visualize the myeloid cell compartment in gliomas (12).