UCK2 and liver cancer: In another study on liver cancer prognosis, DNA methylation was negatively correlated with UCK2 expression, which obtained the same result as ours (71) Additionally, our study has revealed that the DNA methylation level of the UCK2 promoter is significantly reduced in UCEC, THCA, TGCT, PRAD, KIRP, and HNSC, while it is elevated in SARC, LUSC, KIRC, and COAD, in comparison to the adjacent normal tissues (Figures 4D–M).