UCA1 and hepatocellular carcinoma: A meta-analysis that included a total of 16 studies with 1504 patients that contained 6 studies on colorectal cancer, 3 studies on gastric cancer, 3 studies on pancreatic cancer, and 2 studies on hepatocellular carcinoma and esophageal cancer indicated that patients with a high expression of UCA1 in cancer tissues had a poor prognosis.