MGMT and neoplasm: With the mean 4.69 (SD = 2.31) and 4.54 (SD = 2.07) had 5 (14%) patients with MGMT methylated tumours and 6 (11%) patients MGMT unmethylated tumours at most one impaired result, 2–4 impaired results had 9 (25%) vs. 17 (31%) patients, and on more than 5 tests the results were impaired in 22 (61%) vs. 31 (57%) patients.