Kaplan–Meier survival analysis of different grades of glioma patients based on ADAM9 expression. (A) Comparison of the PFS between ADAM9 high and low expression group in patients with LGG tumors (p < 0.001, log-rank test); (B) Comparison of the OS between ADAM9 high and low expression group in patients with LGG tumors (p < 0.001, log-rank test); (C) Comparison of the PFS between ADAM9 high and low expression group in patients with GBMs (p = 0.994, log-rank test); (D) Comparison of the OS between ADAM9 high and low expression group in patients with GBMs (p = 0.656, log-rank test). PFS, Progression-free survival; OS, overall survival; LGG, lower-grade glioma; GBM, glioblastoma.