APOC1 was more highly expressed in tumor tissues than tumor adjacent in Bladder Urothelial Carcinoma (BLCA), COAD, Head and Neck squamous cell carcinoma (HNSC), KICH, KIRC, KIRP, Prostate adenocarcinoma (PRAD), Stomach adenocarcinoma (STAD), Thyroid carcinoma (THCA), and Uterine Corpus Endometrial Carcinoma (UCEC), while it was less expressed in tumor tissues than tumor adjacent tissues in Cholangiocarcinoma (CHOL), LUAD, and LUSC(lung squamous cell carcinoma), with no significant difference in expression in reading (Figures 1C, D). Here, APOC1 is linked to cholangiocarcinoma.