Methylation levels of four individual CpGs (CpGs 17, 18, 21, and 22) in enhancer 3 and the mean of all CpGs targeted were significantly higher in the MGMT-expressing GBM samples than in the -non-expressing GBM samples; for the CpGs in enhancer 1, we did not find a difference between the MGMT-expressing and -non-expressing samples. Here, MGMT is linked to glioblastoma.