BTG2 and glioma: In addition to the losses in 10q indicated above, grade IV IDHmut gliomas were more likely to have gains of 1q25.3 (SMG7, NCF2), 1q32.1 (KIF14, DDX59, BTG2), 6p21.1 (HSP90AB1 and other genes) and loss of 3p21 (multiple genes).