The nature of the immunological interaction between the host and the tumor.
D000818:Animals; D000951:Antigens, Neoplasm; D006649:Histocompatibility Antigens; D007109:Immunity; D007165:Immunosuppression Therapy; D007167:Immunotherapy; D009362:Neoplasm Metastasis; D009368:Neoplasm Transplantation; D009369:Neoplasms / Q000276:immunology*; D009374:Neoplasms, Experimental; D051381:Rats
D000951:Antigens, Neoplasm; D006649:Histocompatibility Antigens