previous reports of hepatic angiosarcoma have not clearly defined the cellular type from which this tumor arises , as evidenced by the terminology of endothelioma , kupffer cell sarcoma , endothelial cell sarcoma , and hemangioendothelial sarcoma , etc. , which have been used interchangeably .
C0225336
endothelial cell
C0018923
hemangioendothelial sarcoma