In the literature sinonasal INI1-deficient carcinoma had immunohistochemically diffused expression of cytokeratins (CK), p16, p40, and p63 in all cases, while expression of CK5/6, CK7 and vimentin was only focal or absent, [8] and the diagnosis of melanoma was definitively excluded. Here, SMARCB1 is linked to carcinoma.