Moreover, in serum from children with International Neuroblastoma Staging System (INSS) stage 4 tumors (p < 0.0001), high-risk neuroblastoma (p < 0.0001), MYCN amplified neuroblastoma (p = 0.0088), and in children who died (p = 0.034) GD2 concentration was significantly higher (Balis et al., 2020). The gene discussed is MYCN; the disease is neuroblastoma.