Figure 4

Immunohistochemistry images of the tumor ceter. A (400×) shows that tumor cells are positive to Vim. B (400×) shows that tumor cells are positive to SMA. C (400×) shows that tumor cells are positive to MSA. D (400×) shows that partial tumor cells are positive to FVIII. E (400×) shows that partial tumor cells are negative to CD31. F (400×) shows that partial tumor cells are negative to CD34.