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IMMUNOHISTOCHEMCIAL FEATURES
Cytokeratin (present, variable, left-top)
CEA, EMA (present, luminal cells)
Vimentin (present; basal cells, right-top)
Smooth muscle actin (present; basal cells, left-bottom)
S-100 (present; basal cells, right-bottom)
Myosin (focal)
GFAP (absent)
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