Fig. 2From: An EGFR T790M-mutated lung adenocarcinoma undergoing large-cell neuroendocrine carcinoma transformation after osimertinib therapy: a case reporta–c Histopathological results of the biopsy specimen. a Hematoxylin and eosin staining. b Carcinoembryonic antigen staining (CEA). c Synaptophysin staining. Original magnification, × 100. d–f Histology of pleural biopsy specimen. d Hematoxylin and eosin staining. e CEA staining. f synaptophysin staining. Original magnification, × 100Back to article page