Fig. 4

Pathological findings. A: The tumor was histologically composed of spindle-shaped cells with an oval swollen nucleus and an increasing number of mitotic figures with a bundle.. HK collected data and wrote the manuscript. YM, TG and HY read and helped to write the manuscript. All authors read and approved the final manuscript. B, C, D: WT-1 was negative because the nucleus was not stained. α-SMA was diffusely strongly positive in cytoplasm (yellow arrow) and CD56 was partially positive in cell membrane (red arrow head) on immunological staining