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Well-differentiated liposarcoma associated with benign lipoma
Hiroshi Hatano1, Tetsuro Morita, Akira Ogose
1Department of Orthopedic Surgery, Niigata Cancer Center Hospital, Niigata, Japan. hatanoh@niigata-cc.jp
Anticancer Research
|May 25, 2004
Summary
Well-differentiated liposarcoma (WDL) frequently co-occurred with subcutaneous lipoma, suggesting a shared tumorigenesis pathway. Protein analysis, particularly for cdk4, supports its role in WDL development.
Area of Science:
- Oncology
- Pathology
- Molecular Biology
Background:
- Well-differentiated liposarcoma (WDL) is a malignant soft tissue tumor.
- The association between WDL and subcutaneous lipoma is not well-established.
- Understanding the molecular mechanisms underlying WDL tumorigenesis is crucial.
Purpose of the Study:
- To review the clinicopathological features of WDL associated with subcutaneous lipoma.
- To investigate the co-existence rate of lipoma in WDL cases.
- To compare the expression profiles of key proteins (cdk4, ki-67, mdm2, p53) in WDL and associated lipomas.
Main Methods:
- Retrospective review of 34 WDL cases treated between 1980-2002.
- Identification of WDL cases with co-existing lipoma.
- Immunohistochemical analysis for cdk4, ki-67, mdm2, and p53 expression in WDL and lipoma tissues.
Main Results:
- Seven out of 34 WDL patients (20.6%) had associated subcutaneous lipoma, a significantly higher rate than other liposarcoma subtypes (2.5%).
- cdk4 was positive in 100% of WDL cases and showed weak immunoreactivity in two lipomas.
- ki-67, mdm2, and p53 were positive in a subset of WDL cases, but negative in all lipomas.
Conclusions:
- The high co-occurrence rate suggests a potential link between lipoma and WDL development.
- cdk4 is implicated in the tumorigenesis of WDL.
- Distinct protein expression profiles in WDL and lipoma highlight molecular differences despite potential shared origins.