Figure 2.

Immunohistochemical staining. A: Positive staining for NSE. B: Positive staining for S100 protein. C: Positive staining for vimentin. D: Positive staining for α-inhibin. E: Negative staining for epithelial membrane antigen (EMA). F: Negative staining for AE1/AE3. G: Negative staining for CD10. H: Negative staining for HMB-45. I and J: CD34 and CD31 underlined the rich and delicate vascular channels, whereas the tumor cells were negative.