Fig. 2. Subclassification of lung adenocarcinoma using immuno-histochemical staining (A, C, E: 100x; B, D, F: 200x). Napsin A (+) and TTF-1 (+) are classified as lung adenocarcinoma. P40 (-) are not stained as lung adenocarcinoma carcinoma cells. (A, B) Napsin A (+), (C, D) TTF-1 (+), (E, F) P40 (-).
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