MGMT and gastrointestinal stromal tumor: Comparing dSDH (N=68) to pSDH (N=92) GIST samples from Killian et al10, we identified a significantly (p=0.00057) higher mean MGMT methylation in dSDH GIST (figure 1A) (mean methylation in dSDH GIST 8.1%; STD 8.0% vs pSDH GIST 5.1%; STD 1.4%).