SLC9D1 and hepatocellular carcinoma: Notably, in 57 out of these datasets, the TMCO3 mRNA level was significantly elevated in HCC tissues, and in three representative datasets: TCGA‐LIHC, GSE14520, and ICGC‐LIRI‐JP, TMCO3 mRNA levels were all increased in tumors (Figure 1F).