MT1G and medullary thyroid gland carcinoma: MT1G hypermathylation was found in 30.2% (64/212) of thyroid cancers, including 31.5% (56/178) of PTC, 25.0% (4/16) of FTC, 22.2% (2/9) of MTC, and 22.2% (2/9) of ATC.