Liposarcoma

**Semantic type:** Neoplastic Process

**Definition:** A usually painless malignant tumor that arises from adipose tissue. Microscopically, it may contain a spectrum of neoplastic adipocytes ranging from lipoblasts to pleomorphic malignant adipocytes. Morphologic variants include: well differentiated, dedifferentiated, pleomorphic, and myxoid liposarcoma. The metastatic potential is higher in less differentiated tumors.

**Synonyms:** - LIPOSARCOMA, MALIGNANT - Liposarcoma, NOS - Malignant Lipomatous Neoplasm - Malignant Lipomatous Neoplasm - liposarcoma