Exploring the Role of TERT in Thyroid Cancer: A Systematic Review

Background: TERT gene mutations play critical roles in tumor progression and have important implications in several solid tumors, including thyroid carcinoma. This study aimed to evaluate the association between TERT promoter mutations and histology and clinical features of thyroid carcinoma (TC). Materials and methods: We performed an up-to-date systematic review and a comprehensive meta-analysis. Systematic searches were made on MEDLINE (via Pubmed) databases using relevant keywords, and articles published until November 1st, 2024 were selected. A total of 54 studies and 17'021 samples are included in the meta-analysis. Relevant data for the meta-analysis was extracted, and for statistical analysis, chi-square calculation was used. Results: Thyroid carcinomas with the highest frequency of TERT mutations are Anaplastic thyroid carcinoma (55.8%) and Diffuse sclerosing variant of papillary thyroid carcinoma (60.4%). No TERT mutations founds in Benign neoplasm, NIFTP and Medullary thyroid carcinoma. Mutations with the highest frequency is c.-124C>T (chr5:1295228 - C228T). TERT mutations are statistically correlated with Stage III&IV, presence of metastasis, overall survival, recurrence and radioiodine-refractory. Conclusion: TERT mutation plays a crucial role as a prognostic biomarker with tumor aggressiveness. Thus, in clinical practice, mutational status assessment of the TERT promoter should be considered for accurate prognostic stratification of TCs.