FASLG and neoplasm: Neutrophil/T‐cell co‐cultures showed that tumor‐infiltrating neutrophils were superior to non‐tumor‐derived neutrophils in inhibiting T cell proliferation and IFN‐γ production, which could be significantly attenuated by blockade of FasL and/or PD‐L2 (Figure 6C), suggesting an immunosuppressive function of tumor‐infiltrating neutrophils in tumor immunity via FasL and PD‐L2.