They identified that epigenetic changes involving five miRNAs (hsa-mir-222, hsa-mir-221, hsa-mir-34a, hsa-mir-214, and hsa-mir-138-2) could be influencing the expression of genes such as BCL2, BCL2L11, PEG3, ALDH1A1, PLA2R1, TFCP2L1, RAB23, TK1, and CTSB, which may play roles in the development of FVPTC. This evidence concerns the gene TK1 and follicular variant thyroid gland papillary carcinoma.