IGF2 and lung cancer: Increased expression of IGF2 caused by loss of genomic IGF2 imprinting (genomic imprinting: only one allele of the gene is active, depending on the parental origin) was registered for cervical cancer, choriocarcinoma, colorectal cancer, hepatoblastoma, lung cancer, rhabdomyosarcoma, pediatric testicular cancer and Wilms’ tumours (Ross et al, 1999; Chao and D’Amore, 2008).