Figure 2From: Stability of the CpG island methylator phenotype during glioma progression and identification of methylated loci in secondary glioblastomas The cross-over between hypermethylated CpG loci probes in grade II, III and IV samples is illustrated with a venn diagram. Numbers refer to the number of hypermethylated probes that belong to genes present in the list by ≥3 probes.Back to article page