Relative content of urea

Adjacent noncancerous tissue

Peritumoral zone

Tumor tissue

Ki-67

0.444* (p = 0.04)

0.404* (p = 0.05)

−0.272 (p = 0.520)

MGMT

−0.478* (p = 0.05)

−0.179 (p = 0.650)

0.161 (p = 0.620)