316042.fig.004a
(a)
316042.fig.004b
(b)
316042.fig.004c
(c)
Figure 4: Histopathological features of the tumor. (a) the spindle cells are arranged in a patternless fashion in the collagenous matrix on hematoxylin-eosin staining (×200). (b) the vast majority of the tumor cells were stained diffusely and strongly for CD34 (×400). (c) cytoplasm in the numerous tumor cells expressed the Bcl-2 (×400).