IL2RG and neoplasm: To understand the contribution of the mouse immune response to human CAR T cell-mediated xenogeneic GvHD, we analyzed GvHD lesions in a human xenograft tumor model in NOD.Cg-<i>Prkdc</i><sup>scid</sup> <i>Il2rg</i><sup>tm1Wjl</sup>/SzJ (NSG) mice.