Fig. 2
From: A case of primary pulmonary leiomyosarcoma completely resected after neoadjuvant chemotherapy
a EBUS-TBNA samples showed densely packed spindle-shaped tumor cells arranged in a fascicular pattern (H&E staining, × 100). b Macroscopic findings showed a yellowish tan tumor (8.0 × 4.8 × 4.0 cm) in the right upper lobe that had invaded the superior vena cava. The white arrow indicates the superior vena cava. The black arrow indicates the tumor. c Densely packed spindle tumor cells arranged in a fascicular pattern. The mitotic count was 16 mitoses per 10 high-powered field (H&E staining, × 100). d Immunohistochemical staining of the spindle tumor cells showed positive findings for smooth muscle actin (× 100). e Immunohistochemical staining of the spindle tumor cells showed positive findings for h-caldesmon (× 100)