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Updated: Feb 7, 2026
06:11
An Efficient Method to Obtain Dedifferentiated Fat Cells
Published on: July 15, 2016
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[Dedifferentiated liposarcoma of extremities: a clinicopathologic analysis]
1Department of Pathology, Beijing Jishuitan Hospital, Beijing 100035, China.
Summary
Dedifferentiated liposarcoma of extremities is a rare cancer. Diagnosis requires combining histological, immunohistochemical, and molecular findings, particularly MDM2 amplification, to distinguish it from other soft tissue tumors.
Area of Science:
- Oncology
- Pathology
- Radiology
Background:
- Dedifferentiated liposarcoma is a rare malignant mesenchymal tumor.
- Liposarcomas can arise in the extremities, presenting diagnostic challenges.
Purpose of the Study:
- To elucidate the clinicopathologic features of dedifferentiated liposarcoma of the extremities.
- To identify key diagnostic markers for this rare tumor type.
Main Methods:
- Retrospective analysis of nine cases diagnosed between 2009 and 2017.
- Histopathological evaluation using HE staining and immunohistochemistry.
- Fluorescence in situ hybridization (FISH) to detect MDM2 amplification.
Main Results:
- Tumors predominantly occurred in the thigh, affecting older adults (mean age 68).
- Histology showed biphasic components: well-differentiated liposarcoma and high-grade sarcoma.
- Immunohistochemistry revealed vimentin, CDK4, p16 expression; MDM2 amplification by FISH was observed in 6/9 cases.
Conclusions:
- Dedifferentiated liposarcoma of the extremities is exceptionally rare.
- Accurate diagnosis necessitates integrating histological, immunohistochemical, and molecular data (MDM2 amplification).
- Differential diagnosis from other soft tissue tumors and tumor-like lesions is crucial.
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