MYCN and neuroblastoma: By generating further colour maps for the expression of the selected genes in MYCN amplified stage 3 or 4 tumours and MYCN non amplified tumours with stages 1, 2, 4s of both studies (Fig. 2A,B), it was observed that the expression pattern of the genes selected by meta-analysis of intermediate risk neuroblastoma explicitly differs in the most aggressive tumours compared to tumours with very good prognosis.