Figure 2.

All tumour cells on immunohistochemical study showed finely granular immunoreactivity of the cytoplasm with antimitochondrial antibody (a: ×200), cytoplasmatic and membranous positivity for antikeratin antibody (b: ×200) and cytoplasmatic positivity for alpha-1-antichymotripsina (c and d: × 200; in c yet note neoplastic perineural infiltration).