TMEM220 and hepatocellular carcinoma: Ultimately, nine lncRNAs (CYTOR, AL117336.2, AC020915.2, SNHG3, AC026401.3, and GSEC, which were upregulated in HCC, and TMEM220-AS1, AC015908.3, and AP001065.3, which were downregulated in HCC) were selected for further study, as shown in Figure 2A.