Immunohistochemically, the tumour cells were diffusely positive for CK7, S-100 (Fig. 2e), p63 (Fig. 2f), SOX10 (Fig. 2g) protein and focally positive for SMA (Fig. 2h) protein and completely negative for CK20, p40, Mammaglobin, CD117 and GCDFP15. This evidence concerns the gene SMN1 and neoplasm.