T cell mediated cytotoxicity T cell mediated cytotoxicity directed against tumor cell target biological_process GO:0002419 T-lymphocyte mediated cytotoxicity directed against tumor cell target T-cell mediated cytotoxicity directed against tumor cell target The directed killing of a tumor cell by a T cell through the release of granules containing cytotoxic mediators or through the engagement of death receptors. Note that either or both mechanisms mentioned in the definition may be used in this process. Note that both granule release and the engagement of death receptors on target cells result in induction of apoptosis in the target cell. T lymphocyte mediated cytotoxicity directed against tumor cell target T cell mediated immune response to tumor cell