PRF1 and neoplasm: Cytokines then drive the following processes: (i) the direct lysing of cancer cells or the capture of dead cancer cells; (ii) antigen processing performed by phagocytose cancer cells; (iii) the activation of T cells mediated adaptive anti-tumor immune responses; and (iv) the release of cytoplasmic granules containing perforin and granzymes, which directly kill cancer cells and so on [13–17].