MGMT and neoplasm: Age, pre-/post-op KPS and MGMT promotor methylation did not differ between both groups (p = 0.123, p = 0.133, p = 0.394, p = 0.268); however, the TERT promotor mutation was more frequently encountered in patients with volumetric changes of tumor remnants (100% versus 76%, p = * 0.012).