CD274 and neoplasm: The Nobel Prize committee awarded Tasuku Honjo for his main discovery of programmed death 1/programmed cell death ligand‐1 (PD‐1/PD‐L1), which caused a sensation from the oncology community in the coming years.[1] PD‐L1 is a cell ligand that specifically binds to PD‐1 on T cells, leading to the inactivation of tumor killer T cells and the subsequent suppression of its anti‐tumor immune responses.