Rhabdomyosarcoma cells expressing anti-ST8SiaII-IB and anti-ST8SiaIV-IB or anti-NCAM-IB or as negative control tumor cells stable transfected with the empty vector were injected intraperitoneally into 3 C57BL/6 J RAG-2 mice at a time. This evidence concerns the gene NCAM1 and rhabdomyosarcoma.