300 Longwood Avenue Boston, MA 02115 (617) 355-6000 My Child Has: Epithelioid Hemangioendothelioma Programs that treat this condition Vascular Anomalies Center   Epithelioid Hemangioendothelioma is a rare, low-grade malignant vascular tumor that occurs in a variety of sites, including the bone, liver, and lungs. The treatment for this tumor, which originates in the endothelium (the layer of cells that line blood and lymphatic vessels, as well as the heart), includes surgical removal or, if the tumor is inaccessible, chemotherapy and radiation therapy. The information on this website should not be taken as medical advice, which can only be given to you by your personal health care professional. Copyright © Children's Hospital Boston. All rights reserved.