PDCD1 and neoplasm: Restoring phagocytosis by inhibiting “do‐not‐eat me” signals or by blocking the programmed cell death protein 1‐programmed death‐ligand 1 (PD1‐PD‐L1) axis, increases macrophage phagocytosis of tumour cells, thereby enhancing survival in mouse models of cancer in a macrophage‐dependent manner.1, 2