A case of primary pulmonary leiomyosarcoma completely resected after neoadjuvant chemotherapy

Figures

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  Fig. 1. a, b Chest computed tomography (CT) before treatment showed an 11.0-cm mass in the right upper lobe that had invaded the superior vena cava (from the right internal jugular vein to the right atrium). c, d CT after chemotherapy showed a 5.6-cm mass in the right upper lobe. The reduction rate of the tumor size was 49.1%

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  Fig. 2. 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)