There was a trend for untreated tumors in the EGFR tumor group (6 untreated vs. 1 treated) and for treated tumors in the PDGF group (3 untreated, 6 treated) but this was neither significant for GBM (p = 0.11) nor for all tumors (p = 0.09). This evidence concerns the gene EGFR and glioblastoma.