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. 2012 Jun 15;185(12):1316–1322. doi: 10.1164/rccm.201202-0294OC

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Copyright © 2012 by the American Thoracic Society

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Figure 1. — (A) Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) smear demonstrating adenocarcinoma (May-Grunwald Giemsa stain). (B) Cell block obtained from EBUS-TBNA demonstrating adenocarcinoma. (C) Adenocarcinoma from EBUS-TBNA cell block, positive for thyroid transcription factor-1 (TTF-1), confirming lung origin. (D) EBUS-TBNA cell block demonstrating adenocarcinoma to be excision repair cross-complementing group 1 (ERCC1) positive, suggesting resistance to platinum-based chemotherapies.