CCND1 and lung adenocarcinoma: Liu et al showed that miR‐138 inhibited nasopharyngeal carcinoma growth and tumorigenesis by targeting CCND1. Besides, Cai et al found that CCND1, CDK2 and CDK6 could be directly targeted by miR‐186 in lung adenocarcinoma.25 However, the roles of CCND1, as well as miR‐338‐3p/CCND1 axis in the TC tumorigenesis were little understood.