Higher expression of hepcidin was observed in breast invasive carcinoma (BRCA), colon adenocarcinoma (COAD), esophageal carcinoma (ESCA), head and neck squamous cell carcinoma (HNSC), kidney chromophobe (KICH), kidney renal papillary cell carcinoma (KIRP), LUAD, LUSC and stomach adenocarcinoma (STAD) compared with the corresponding normal tissues (Figure 1A). Here, HAMP is linked to head and neck squamous cell carcinoma.