KRT17 and neoplasm: K17 protein was identified in the tumor epithelial cells (Fig. 2a–d), in pancreatic intraepithelial neoplasia grade 2 and 3 (PanIN2/3), and was occasionally seen in centroacinar cells but was not detected in PanIN1, benign proliferative ducts, or in other cellular elements, substantially validating our previous in silico predictions22.