liposarcoma

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Related to liposarcomas: lipoma

liposarcoma

 [lip″o-sahr-ko´mah]
a malignant tumor characterized by large anaplastic lipoblasts, sometimes with foci of normal fat cells.

lip·o·sar·co·ma

(lip'ō-sar-kō'mă),
A malignant neoplasm of adults that occurs especially in the retroperitoneal tissues and the thigh, usually deep in the intermuscular or periarticular planes; histologically, liposarcoma is a large tumor that may be composed of well-differentiated fat cells or may be dedifferentiated, either myxoid, round-celled, or pleomorphic, usually in association with a rich network of capillaries; recurrences are common, and dedifferentiated liposarcoma metastasizes to the lungs or serosal surfaces.
[lipo- + sarx, flesh, + -oma, tumor]

lip·o·sar·co·ma

(lip'ō-sahr-kō'mă)
A malignant neoplasm of adults that occurs especially in the retroperitoneal tissues and the thigh; planes composed of well-differentiated fat cells, or may be dedifferentiated, either myxoid, round celled, or pleomorphic; recurrences are common, and dedifferentiated liposarcomas metastasize to the lungs or serosal surfaces.
Synonym(s): lipoblastoma (1) .
[lipo- + sarx, flesh, + -oma, tumor]

liposarcoma

A very rare malignant tumour of fatty tissue. Liposarcomas usually occur in the fat on the inside of the back wall of the abdomen or in the MEDIASTINUM of elderly people.
References in periodicals archive ?
Liposarcomas and atypical lipomatous tumors: a study of 66 cases followed for a minimum of 10 years.
These tumors range from the simple lipoma to the liposarcoma. Other non-lipomatous tumors have regions with the imaging appearance of fat including hemangiomas and myositis ossificans.
Dedifferentiated liposarcoma typically presents in middle-aged and older adults as a large, deep-seated mass.3,8 The most common site is retroperitoneum, which accounts for approximately half the cases, followed by inguinoscrotal region and thigh.
Myxoid liposarcomas have an inhomogeneous appearance on CT and MRI, especially under contrast, and may even appear cystic on MRI.
The value of fat-suppressed T2 or STIR sequences in distinguishing lipoma from well-differentiated liposarcoma. Eur Radiol.
Atypical lipomatous tumour/well differentiated liposarcoma. In: Fletcher C, Unni KK, Mertens F (eds).
Progression-Free survival among patients with well-differentiated or de-differentiated liposarcomas treated with CDK4 Inhibitor Palbociclib.
Ruggieri, "Atypical lipomatous tumors/well-differentiated liposarcomas: clinical outcome of 67 patients," Orthopedics, vol.
Histologically, liposarcoma is classified into four subtypes: well-differentiated, dedifferentiated, myxoid/round, and pleomorphic [6].
Presence of other internal components besides thin internal septa may suggest liposarcoma [6].