As shown in Fig. 1A, FTH was significantly upregulated in most tumors, including Cholangiocarcinoma (CHOL), Neck squamous cell carcinoma (HNSC), Kidney renal clear cell carcinoma (KIRC), Kidney renal papillary cell carcinoma (KIRP), Liver hepatocellular carcinoma (LIHC), Thyroid carcinoma (THCA) and so on, compared with respectively adjacent normal tissues. This evidence concerns the gene FTH1 and cholangiocarcinoma.