A case report of angiosarcoma of the tongue is presented. The specimen reve
aled single and clustered large, pleomorphic, and spindle-shaped cells with
a markedly hemorrhagic background. Tumor cells showed expression of thromb
omodulin and E-selectin. but no expression of Factor VIII-related antigen,
Ulex europaeus agglutinin-I, vascular endothelial growth factor, and CD34.
In the current study, immunohistochemical results using antibodies against
thrombomodulin and E-selection supported the diagnosis of angiosarcoma.