Fig. 2

Scans of histological slides stained with hematoxylin–eosin and immunohistochemically. a A lobulated architecture is observed, separated by a dense fibrous stroma with lymphocyte infiltration. (4x) b Polygonal tumor cells with an abundant clear cytoplasm. Nuclei are round to oval with small nucleoli. (20x) c AE1/AE3 (10x): Note the strong diffuse positivity in the tumor cell. d EMA (10x): Note the positivity in the tumor cell. e CK18 (10x): Note the strong diffuse positivity in the tumor cell. f CD10 (10x): Note the partial positivity in the tumor cell. g PAX8 (10x): Note the strong diffuse positivity in the tumor cell. h Vimentin (10x): Note the strong diffuse positivity in the tumor cell