(a)

(b)

(c)

(d)

Figure 2: Immunohistochemical expression of CD34 and Ki67. Ki-67 showed a very low expression ((a) (20 XHPF) and (b) (40 XHPF)). The neoplastic cells express diffusely CD34 immunoreactivity ((c) (20 XHPF) and (d) (40 XHPF)).