KRT19 and cancer: Multiple previous works have described the use of KRT19 as biomarker in the differential diagnosis and characterization of most different epithelial tumors, and its role has been declared in many types of cancers, including colorectal [24], renal [25], bladder [26], gastric [27], breast [28,29], lung [14], pancreatic [30] and other [31,32] types of malignancies.