hemangioendothelioma

Hemangioendotheliomas are a family of vascular neoplasms of intermediate malignancy.

==Signs and symptoms== They have been described as masses that fall between a hemangioma and angiosarcoma. They are vascular tumors that commonly present with an enlarging mass and most commonly involve the lungs, liver, and musculoskeletal system, although many other body sites have been reported, including the head and neck, intestines, lymph nodes, pleura, retroperitoneum, heel, stomach.