Figure 1.

Immunohistochemical staining images of CD4⁺/CD25⁺ Treg cells in serial sections. (a) and (b) are serial images of CD4⁺ and CD25⁺ T cells among the nonhemorrhagic transformation group, respectively. (c) and (d) are serial sections of CD4⁺ and CD25⁺ T cells among the hemorrhagic transformation group, respectively. The dark arrows represent the positive-stained cells. Scale bar: 50 μm.