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Immunohistochemistry findings showing epithelial protein loss (A–C) and mesenchymal protein expression (D-H) in lung adenocarcinoma. A Cytoplasmic cytokeratin loss. B Membranous E-cadherin loss. C Nuclear TTF-1 loss. D Nuclear and Cytoplasmic β-catenin expression. E Cytoplasmic vimentin expression. F Nuclear Snail expression. G Cytoplasmic Twist expression. H Membranous CD44 expression.
