According to the final model, in patients with neuroblastoma tumor type, the estimated PB-CD34+ counts necessary to reach apheresis thresholds of 2 × 106 and 5 × 106 AP-CD34+ cells/kg with a probability of 0.90 were 27.32 (90% CI: 0.16–50.51) and 103.20 (90% CI: 56.15–165.18) × 106/L, respectively. This evidence concerns the gene CD34 and neoplasm.