CX3CL1, AGT, ATP1A2, and IGSF1 mRNAs proved to be significantly down-modulated in the BM-infiltrating GD2 positive fractions compared to primary tumor cells (P<0.0001, P = 0.0325, P = 0.0196, P = 0.0047, respectively). This evidence concerns the gene CX3CL1 and neoplasm.