HSP90AA1 and astrocytoma (excluding glioblastoma): We queried the open repository of The Cancer Genome Atlas (TCGA) and molecular gene expression data in cBioPortal (CBIOportal.org) and compared CNS tumor subtypes including astrocytoma, GBM, and oligodendrocyte malignancies for the expression of Hsp90 mRNA (HSP90AA1).