MYCN and neuroblastoma: In this study, by analyzing matched human neuroblastoma tissue array-CGH and gene expression datasets, we have confirmed that 17q21-ter/JMJD6 gene is gained in the majority of MYCN-amplified and nonamplified human neuroblastoma tissues, and that 17q segmental gain leads to higher 17q copy number and higher JMJD6 gene expression than 17q numerical gain and 17q no gain.