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Representative immunohistochemical staining for solid predominant lung adenocarcinoma (A). The tumor cells were immunohistochemically stained negative for glypican-1 (B), p40 (C), and cytokeratin 5/6 (D) but were positive for thyroid transcription factor-1 (E) and napsin A (F) (hematoxylin and eosin ×200).
