KRT5 and neoplasm: Immunohistochemical analysis showed tumor cells diffusely positive for cytokeratin (CK) 8/18 and calretinin and focally positive for CK 5/6 and Wilms’ tumor 1 (WT1), e-cadherin, and human bone marrow endothelial- 1 (HBME-1) (Figure 2).