PT - JOURNAL ARTICLE AU - Andrew J Colebatch AU - Alexander Dobrovic AU - Wendy A Cooper TI - <em>TERT</em> gene: its function and dysregulation in cancer AID - 10.1136/jclinpath-2018-205653 DP - 2019 Jan 28 TA - Journal of Clinical Pathology PG - jclinpath-2018-205653 4099 - http://jcp.bmj.com/content/early/2019/01/28/jclinpath-2018-205653.short 4100 - http://jcp.bmj.com/content/early/2019/01/28/jclinpath-2018-205653.full AB - In this review, we summarise the function and structure of telomerase reverse transcriptase (TERT) in humans, including its regulation. The dysregulation of telomerase through TERT promoter mutations across a range of cancers is discussed. The molecular mechanism activated by TERT promoter mutations is outlined. Finally, the timing of TERT promoter mutations during carcinogenesis is reviewed in the context of their potential utility as clinical biomarkers of malignant transformation.