*Tumors stimulate specific adaptive immune responses ation a ndicate b hovte-rich inflammatory *Tumors stimulate specific adaptive immune responses ved from host cells,the tumors e t immune response erimenta No tumor growth Tumor growth *Tumors stimulate specific adaptive immune responses Lymphocytic inflammation associated with certain tumors. A, Medullary breast carcinoma. B, Malignant melanoma. Red arrows indicate malignant cells. Yellow arrows indicate lymphocyte-rich inflammatory infiltrates. Clinical observations and animal experiments have established that although tumor cells are derived from host cells, the tumors elicit immune responses. *Tumors stimulate specific adaptive immune responses Clinical observations and animal experiments have established that although tumor cells are derived from host cells, the tumors elicit immune responses. Experimental demonstration of tumor immunity