Immune checkpoint inhibitors have become the standard of care for many patients with advanced solid cancers. These agents differ from chemotherapy by activating antitumor T-cells to detect and destroy tumor cells.
1 Agents currently in clinical use and being widely tested in clinical trials for multiple tumor types include monoclonal antibodies against anti–cytotoxic T-lymphocyte–associated antigen 4 (CTLA-4), anti–programmed cell death protein 1 (PD-1), and anti–programmed cell death ligand 1 (PDL-1).