Liu et al. conducted a meta-analysis of 1,240 patients from 15 articles on colorectal cancer, esophageal squamous cell carcinoma, prostate cancer, hepatocellular carcinoma, non-small cell lung cancer, gastric cancer, ovarian cancer and concluded that lncRNA UCA1 was an independent prognostic factor for OS in cancer patients [49]. The gene discussed is UCA1; the disease is esophageal squamous cell carcinoma.