DLK1 and central nervous system cancer: The DLK1-MEG3 imprinted locus is altered in a series of primary human tumors (myelomas, Wilms tumors, neuroblastomas, gliomas, see Huang et al., 2006; Kawakami et al., 2006; Jørgensen et al., 2013) and MEG3 gene expression is consequently lost in several tumor cell lines (Zhou et al., 2013).