PMS2 and glioblastoma: Amplification of the PMS2 gene is frequently found in glioblastoma multiforme (GBM, 454 [79.5%] of 571), lower grade glioma (LGG, 134 [22.4%] of 510), HNSC (205 [39.7%] of 517) and OV (132 [23.5%] of 562).