FAP and neoplasm: Hu et al. [33] reported the development of two 18F-labeled PSMA/FAP bispecific tracers, [18F]AlF-PSMA-FAPI-01 and [18F]AlF-PSMA-FAPI-02 (Figure 1B), and both showed higher uptake in PSMA- and FAP-expressing tumor models when compared with the PSMA- and FAP-targeting monospecific tracers, respectively.