. "Any process that activates or increases the frequency, rate, or extent of an immune response to tumor cell." . . . . "positive regulation of immune response to tumor cell" . "activation of immune response to tumor cell" . "positive regulation of immune response to tumour cell" . "stimulation of immune response to tumor cell" . "up regulation of immune response to tumor cell" . "up-regulation of immune response to tumor cell" . "upregulation of immune response to tumor cell" . . . . . .