When compared to mock-vaccinated (non-immune) and to allogeneic cell-vaccinated (allo-immune) mice, the spleen of immune, tumor-free mice (vaccinated with semi-allogeneic somatic cell hybrids) expressed significantly higher levels of the following notable genes (in addition to those listed in Table 1): CD209a (DC-SIGN), CD28, CD83, FAS, Flt3L, H2-DMa, ICOSL (B7-H2), ITGAX (CD11C), LTA, NFKB, and XCL1 (ATAC). This evidence concerns the gene FLT3LG and neoplasm.