CSF1R and neoplasm: Besides these applications, PET imaging of CSF-1R could also be useful for the evaluation of new specific and sensitive CSF-1R inhibitors that have been emerged as potential TAM-therapies, as well as a better understanding of CSF-1R mechanisms involved in the tumor progression (Cendrowicz et al. 2021; Zhang et al. 2020; Noy and Pollard 2014).