SUV39H1 and central nervous system cancer: The paucity of information in this regard prompted us to undertake an immunohistochemical analysis of H1x, H3K9me3, H4K20me3, SETDB1 and SUV39H1 in a large series of astrocytic tumors in order to investigate the interrelations between the expression levels of these molecules and their potential importance in glioma progression.