CDK2 and thyroid cancer: We analyzed CDK2 expression in thyroid cancer by using the RNA sequencing data from the Gene Expression Omnibus (GEO) cohort and the Fudan University Shanghai Cancer Center (FUSCC) cohort, and the immunohistochemical (IHC) results of the FUSCC cohort, in order to explore CDK2's clinicopathological correlations in thyroid cancer (Figure3a).