We also assessed expression of the nine genes in high-risk neuroblastomas (as defined by INRG staging31) with (n=67) and without (n=77) MYCN amplifications in the Kocak tumor cohort.30 High-level expression of the 9-gene group was correlated (P=2.08e−08) with MYCN amplification. The gene discussed is MYCN; the disease is neuroblastoma.