Similarly, the favor prognosis of TERT promoter mutation in CDKN2A/B none homozygous deletion IDH mutant adult‐type gliomas, which the difference with the CDKN2A/B homozygous deletion group may be caused by the limited number of CDKN2A/B homozygous deletion group. The gene discussed is TERT; the disease is central nervous system cancer.