CCDC6 and cholangiocarcinoma: The CCDC6 expression levels in the tumor tissues of cholangiocarcinoma (p<0.001), colon adenocarcinoma (p<0.001), esophageal carcinoma (p<0.05), liver hepatocellular carcinoma (p<0.001), lung adenocarcinoma (p<0.001), stomach adenocarcinoma (p<0.001), and uterine corpus endometrial carcinoma (p<0.01) are higher than those in the corresponding control tissues, as shown in Figure 1A.