396097.fig.004a
(a)
396097.fig.004b
(b)
396097.fig.004c
(c)
Figure 4: (a) Histopathologic examination revealed pathognomonic features of a hemangioendothelioma, showing that the tumour was mainly composed of epithelioid cells which form primitive vascular channels. Some cells even showed evocating intracytoplasmic vacuoles. (b, c) Immunohistochemical stains for factor CD 34 and vimentin displayed positive reaction.