As shown in Fig. 2A, UCA1 expression in many kinds of tumor tissues is higher than that in the corresponding control tissues, such as bladder urothelial carcinoma (BLCA), cholangiocarcinoma (CHOL), lung squamous cell carcinoma (LUSC), stomach adenocarcinoma (STAD), and thyroid carcinoma (THCA). This evidence concerns the gene UCA1 and cholangiocarcinoma.