Fig. 2
From: Primary cerebral epithelioid angiosarcoma: a case report
A Cells are heterotypic, with prominent nucleoli and mitotic figures. Nest-shaped epithelioid tumor cells can be seen with hemorrhage and necrosis, as well as the formation of a vascular lumen (HE staining, × 200). B CD31 staining (× 200). C ERG staining (× 200). D Fli-1 staining (× 200). E CK staining (× 200). F Ki-67 proliferation index of 40%