KIT and neuroblastoma: To verify this hypothesis, we measured by Real-time RT-PCR the expression level of Neurofilament 68, a marker of NB cell differentiation, (NF68, RefSeq NM_006158.4) and of C-Kit, associated with self-renewal capacity (C-Kit, RefSeq NM_000222), in the nodules derived from treated and untreated mice.