DNA methylation levels in different groups.

Analysis of sample DNA methylation mean β values for all probes, TSS200 probes, TSS1500 probes, 1st Exon probes, Gene Body probes, 3′UTR probes, and 5′UTR probes. Atypical and malignant meningiomas tend to have decreased levels of global DNA methylation in comparison to benign meningiomas.