A malignant tumor derived from primitive or embryonal lipoblastic cells. It may be composed of well-differentiated fat cells or may be dedifferentiated: myxoid (LIPOSARCOMA, MYXOID), round-celled, or pleomorphic, usually in association with a rich network of capillaries. Recurrences are common and dedifferentiated liposarcomas metastasize to the lungs or serosal surfaces. (From Dorland, 27th ed; Stedman, 25th ed)

Synonyms: Liposarcomas, Well Differentiated Liposarcomas, Lipomatous Tumor, Atypical, Pleomorphic Liposarcoma, Dedifferentiated Liposarcoma, Well Differentiated Liposarcoma, Pleomorphic Liposarcomas, Liposarcoma, Dedifferentiated, Atypical Lipomatous Tumors, Dedifferentiated Liposarcomas, Liposarcoma, Well Differentiated, Atypical Lipomatous Tumor, Liposarcoma, Liposarcoma, Pleomorphic