http://www.orthopaedicweblinks.com 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. <br>MeSH Search Term "Liposarcoma"[mesh] <br>ICD-10 Code M8850/3 Liposarcoma NOS <br>SNOMED-CT Term Liposarcoma (disorder) Concept ID: 254829001 en-us Sun Dec 03 2017 07:00:38 GMT Copyright 2005 OWL Inc. orthopaedicweblinks@gmail.com (Christian Veillette) orthopaedicweblinks@gmail.com (OWL Inc.) http://www.orthopaedicweblinks.com/Detailed/10849.html Medscape The differential diagnosis of a soft-tissue mass includes a variety of benign lesions as well as sarcoma, primary or metastatic carcinoma, melanoma, and lymphoma. There is no distinctive, classic presentation for extremity sarcoma, and chief complaints may vary. It is important to consider the etiology of the neoplasm and any predisposing factors elicited by a careful history. Factors increasing suspicion for sarcoma diagnosis include genetic predisposition syndromes (Li-Fraumeni syndrome, neurofibromatosis), radiation exposure, chronic lymphedema (Stewart-Treves syndrome), trauma, or certain chemical occupational exposures 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10849 Elizabeth Delshad, BS; Kathryn Spanknebel, MD; Désirée Ratner, MD http://www.orthopaedicweblinks.com/Detailed/10854.html US National Institutes of Health. List of therapeutic trials recruiting liposarcoma patients 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10854 Not Available http://www.orthopaedicweblinks.com/Detailed/10848.html Liposarcoma is a malignancy of fat cells. In adults, it is the most common soft tissue sarcoma. Liposarcoma normally appears as a slowly enlarging, painless, nonulcerated submucosal mass in a middle-aged person, but some lesions grow rapidly and become ulcerated early. 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10848 Schwartz & Centurion http://www.orthopaedicweblinks.com/Detailed/10850.html Liposarcoma risk factors may include Lipomatosis, multiple, hereditary Liposarcoma: Definition(s) via UMLS "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)" 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10850 Not Available http://www.orthopaedicweblinks.com/Detailed/10857.html Liposarcoma occurs in the deep soft tissue of extremities and in the retroperitoneum. It is the most common soft tissue sarcoma and accounts for 20% of all mesenchymal tumors. They are typically large bulky tumors which tend to have multiple satellite lesions extending beyond the gross confines of the tumor. Patients usually note a deep seated mass in their soft tissue for tumors of the extremity. Only when the tumor is very large, do symptoms of pain or functional disturbances occur. 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10857 Not Available http://www.orthopaedicweblinks.com/Detailed/10852.html Two Forms: - low grade myxoid liposarcoma; - most common; - occurs in young adults; - in myxoid liposarcoma, lipoblasts are dispersed in anastomosing capillary framework; - fine reticular vascular pattern; - high grade pleomorphic liposarcoma: - pleomorphic liposarcoma is more common in older patients; - enlarging but painless mass in the buttocks (most common site), proximal thigh, or upper arm is the classic presentation; - more aggresive tumor which tends to invade bone; - have amorphously arranged large vascular lakes; - contains large, pyknotic, bizarre, mononucleated cells in combinatination with immature lipoblasts; 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10852 Wheeless http://www.orthopaedicweblinks.com/Detailed/10856.html Liposarcoma is a malignant tumor that arises in fat cells in deep soft tissue, such as that inside the thigh or in the retroperitoneum. They are typically large bulky tumors which tend to have multiple smaller satellites extending beyond the main confines of the tumor. 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10856 Multiple Authorship http://www.orthopaedicweblinks.com/Detailed/10863.html Liposarcoma is the most common soft tissue malignancy in adults accounting for at least 20% of all sarcomas in this age group. Myxoid-round cell liposarcoma is a subtype of liposarcoma characterized by the presence of the reciprocal chromosomal translocation t(12;16)(q13;p11). This translocation creates the FUS-DDIT3 chimeric gene. Sánchez-Martín M, González-Herrero I, Sánchez-Garcia I . Soft Tissue Tumors: Liposarcoma: Myxoid liposarcoma. Atlas Genet Cytogenet Oncol Haematol. November 2004 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10863 Sánchez-Martín et al http://www.orthopaedicweblinks.com/Detailed/10851.html Liposarcoma is one of the least frequent nonrhabdomyosarcoma soft tissue sarcomas that occur in childhood; it comprises less than 5% of all soft tissue sarcomas. Surgical excision is the primary treatment, and prognosis is dependent on histologic subtype and degree of resection. For patients with residual disease, radiotherapy has been used. 2007-03-25 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=10851 Knawar & Konstantakos http://www.orthopaedicweblinks.com/Detailed/17400.html Illustrated cases 2010-06-07 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=17400 James Johnston http://www.orthopaedicweblinks.com/Detailed/17401.html Illustrated case history 2010-06-07 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=17401 James Johnston http://www.orthopaedicweblinks.com/Detailed/17402.html Illustrated cases 2010-06-07 07:00:38 GMT http://www.orthopaedicweblinks.com/cgi-bin/owl/jump.cgi?ID=17402 James Johnston