CCND1 and lung adenocarcinoma: It was reported that CCND1 could be directly targeted by miR‐186 to affect lung adenocarcinoma progression.25 In addition, previous report showed that CCND1 could be directly targeted by miR‐195 to affect tumour growth and metastasis in PTC Cell Lines.24 Our results revealed that CCND1 was greatly up‐regulated in TC tissues and cell lines.