FAP and neoplasm: Fibroblast activation protein (FAP), as one of the overexpressed transmembrane serine proteases in tumor‐associated fibroblasts, becomes a good candidate for tumor‐associated fibroblast targeting due to its great selectivity.[89] FAP CAR‐T cells showed the FAP‐specific cytotoxicity against FAP+ stromal cells and an effective tumor growth inhibition ability as a single treatment.[90] Also, Kakarla et al.