As shown in Table S2, KK‐LC‐1 upregulation was significantly correlated with multiple malignant clinicopathological characteristics of HCC, including α‐fetoprotein (P = 0.017), Edmondson‐Steiner grading (P = 0.035), microvascular invasion (P = 0.013) and TNM stage (P = 0.003). This evidence concerns the gene CT83 and hepatocellular carcinoma.