For PFI (Progression-Free Interval), the overexpressed mRNA level of IL-15 showed an adverse factor in LGG (p < 0.001), THYM (p = 0.019), GBM (p < 0.001), PRAD (p = 0.026) and OV (p = 0.022) (Supplementary Table S1). The gene discussed is IL15; the disease is glioblastoma.