Studies investigating K17 protein expression (n = 38; 36 protein only and 2 RNA and protein) have found K17 to hold negative prognostic value in the vast majority of cancer type (breast [37], cervical [19,31,50], colorectal [54,55], endometrial [30], esophageal [56,57], gallbladder [58,59], gastric [26,60,61], HNSCC [15,24], ovarian cancer [27], pancreatic [31,35] and renal carcinoma [62], and TNBC [43,63]). The gene discussed is KRT17; the disease is head and neck squamous cell carcinoma.