ENPP1 and neoplasm: To assess whether ENPP1 expression levels were related to the tumor-infiltrating immune cells in LIHC, the ssGSEA algorithm in Xiantao Xueshu was used to show the association between ENPP1 expression and several immune infiltrating cells, such as dendritic cells (DCs), CD56 (bright) natural killer cell (NK CD56bright), and Th1 cells (Figure 7(a)).