Despite the fact that CFSE labelled CD8 T cells were present in the spleen and tumor at endpoint (data not shown), there was no impact on survival from transfer of either IL-15 TG/MT, MT or IL-15 TG splenic CD8 T cells or IL-15 TG/MT tumor CD8 T cells after a subcutaneous primary MT tumor injection. Here, IL15 is linked to neoplasm.