<prompt> Answer this question truthfullyWhat is glioma and what are the causes of this condition?  <response>: <reason> Common causes of glioma include genetic mutations ERCC1, ERCC2, XRCC1, MGMT, IDH1, IDH2, p53, EGFR, TSC1, TSC2, RB1, APC, hMLH1, hMSH2, PMS2, PTEN, NF1, and NF2. 