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Major cancer immune surveillance and immune evasion mechanisms. For detailed description see text. APCs, antigen presenting cells; MHC class I, major histocompatibility complex class I; PD-L1, programmed death-ligand 1; Treg, regulatory T cell; MDSC, myeloid-derived suppressor cell; TAM, tumor-associated macrophages; NK cell, natural killer cell; NKT cell, natural killer T cell. Adapted from Chen and Mellman (2013).
