The risk score of each HCC patient was calculated as follows: Risk score = (−0.414 × KLRB1 expression) + (0.067 × CD7 expression) + (−0.003 × LDB2 expression) + (0.157 × FCER1G expression) + (0.068 × PFN1 expression) + (−0.133 × FYN expression) + (0.105 × ACTG1 expression) + (0.087 × PABPC1 expression) + (0.403 × CALM1 expression) + (0.083 × RPS8 expression). This evidence concerns the gene CALM1 and hepatocellular carcinoma.