CDKN2A and leukemia: It has been reported that methylation of TSG results in dysregulation of the cell cycle (CDKN2A/B), apoptosis (DAPK1/CDKN2A/APAF1), WNT (soluble WNT inhibitors) and JAK/STAT signaling (SOCS1 and PTPN6) in leukemia, lymphoma and myeloma, suggesting that TSG methylation plays an important role in the pathogenesis of various hematological cancers [5-8].