The DNA repair gene expressions correlated positively among themselves, particularly RAD51 with FEN1 (flap structure-specific endonuclease 1) (r = 0.632, p = 0.0001) and with UNG (uracil DNA glycosylase) (r = 0.263, p = 0.003) in GBM. Here, UNG is linked to glioblastoma.