The phenomenon of target cell destruction by immunologically active effector cells. It may be brought about directly by sensitized T-lymphocytes or by lymphoid or myeloid "killer" cells, or it may be mediated by cytotoxic antibody, cytotoxic factor released by lymphoid cells, or complement.

Synonyms: Tumoricidal Activity, Immunologic, Immunologic Tumoricidal Activity, Tumoricidal Activities, Immunologic, Immunologic Tumoricidal Activities, Immunologic Cytotoxicity, Cytotoxicity, Immunologic