KRT5 and neoplasm: In order to further investigate the tumour phenotype, an immunohistochemistry (IHC) panel including pancytokeratin (PanCK), cytokeratin 5/6 (CK 5/6), and cytokeratin 8/18 (CK 8/18) as epithelial markers, p63 and calponin as myoepithelial markers, vimentin as mesenchymal marker, neurofilaments and chromogranin as neuroendocrine markers was performed, while CD3 and CD20 were included to better characterise the lymphocytic infiltrate.