TERT and medullary thyroid gland carcinoma: Two retrospective studies to date have found that TERT promoter mutations decrease survival rates in PTC and FTC.13, 14TERT promoter mutations have also been identified in papillary microcarcinomas17 and Hurthle cell cancers18 but not in medullary thyroid cancers.8, 9, 10, 19 It has been possible to detect TERT promoter mutations in fine‐needle aspiration samples, suggesting that their pre‐operative detection may contribute to appropriate surgical assessment.20, 21, 22