CCND3 and thyroid gland undifferentiated (anaplastic) carcinoma: miR‐138 is significantly downregulated in anaplastic thyroid carcinoma (ATC), where it regulates cyclin D3 (CCND3), as well as in hepatocellular carcinoma (HCC), where it regulates the human telomerase reverse transcriptase (hTERT) (Mitomo et al., 2008; Wang et al., 2012).