FAS and neoplasm: In tumor immunity, the Fas/FasL pathway also plays a central role, not only in mediating off‐target “bystander” killing of antigen‐negative tumor cells, but also in the immune escape mechanism from tumors.[24] Therefore, the study of the Fas/FasL pathway contributes to an in‐depth understanding of the regulatory mechanism of apoptosis and provides new ideas for tumor therapy.