Fig. 3From: Sclerosing pneumocytoma diagnosed by preoperative endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA)Immunohistochemical staining of the histological core specimen obtained by EBUS-TBNA. a The peripheral cells were positive for napsin A. b The oval stromal cells were positive for vimentin. c The biphasic cells were diffusely positive for TTF-1. d The biphasic cells were also partly positive for PgRBack to article page