fig3

Figure 3. IHC panel. (A) Negative result of IHC for SMA; (B) positive result of IHC for ALK-1l; (C) IHC for C-Kit shows tumor cells with mitotic index of less than 5%; (D) IHC for MIB index. IHC: immunohistochemistry; ALK: anaplastic lymphoma kinase; SMA: smooth muscle actin