MONDO_0015523 (epithelioid hemangioendothelioma) can be described as follows. A low-grade malignant blood vessel neoplasm. It is characterized by the presence of epithelioid endothelial cells. The neoplastic cells are arranged in cords and nests, which are embedded in a myxoid to hyalinized stroma. Also known as: epithelioid angioendothelioma, epithelioid angiosarcoma, malignant epithelioid hemangioendothelioma.