(liposarcoma, malignant) A malignant neoplasm composed of adipose tissue.

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)

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.

Liposarcoma (LS), a type of soft tissue sarcoma, describes a group of lipomatous tumors of varying severity ranging from slow-growing to aggressive and metastatic. Liposarcomas are most often located in the lower extremities or retroperitoneum, but they can also occur in the upper extremities, neck, peritoneal cavity, spermatic cord, breast, vulva and axilla.

Malignant neoplasms which probably originate in primitive mesenchymal stem cell populations differentiating down a lipomatous pathway.

Malignant tumor derived from primitive or embryonal lipoblastic cells; may be composed of well-differentiated fat cells or may be dedifferentiated: 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.

Liposarcoma is a malignancy of fat cells (see Liposarcoma in the Pediatric Medicine section and Liposarcoma, Soft Tissue in the Radiology section). In adults, it is the most common soft tissue sarcoma.

Liposarcoma is a rare type of cancer that begins in the fat cells. Liposarcoma is considered a type of soft tissue sarcoma.

Liposarcoma is a tumor that arises from fat tissue. This tumor often occurs in the thigh, legs, behind the knee, or in the abdomen, but it can be found in other parts of the body, in the retroperitoneum; and, less often, in the head and neck area. Their primary occurrence in the skin is rare. Because a liposarcoma may grow into...