TGFB1 and hepatocellular carcinoma: To analyze the prognostic value of combining LASS2 and TGF-β1 levels for HCC in the test cohort, we divided patients into the following four groups, such as: low LASS2 low TGF-β1 group, high LASS2 low TGF-β1 group, low LASS2 high TGF-β1 group, and high LASS2 high TGF-β1 group.