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Liposarcoma of soft tissue: MRI findings with pathologic correlation
1Department of Radiology, Hospital of Ege University, Bornova, Izmir, Turkey.
Skeletal Radiology
|March 1, 1997
Summary
MRI findings help differentiate liposarcoma subtypes. Well-differentiated liposarcomas appear fatty, while myxoid and pleomorphic types show increased heterogeneity and contrast enhancement, indicating higher malignancy.
Area of Science:
- Radiology
- Oncology
- Pathology
Background:
- Liposarcomas are malignant tumors arising from fat cells.
- Accurate histologic subtyping is crucial for prognosis and treatment planning.
Purpose of the Study:
- To correlate magnetic resonance imaging (MRI) findings with histopathologic features of different liposarcoma subtypes.
- To evaluate the diagnostic utility of MRI in differentiating liposarcoma histologic types.
Main Methods:
- Retrospective review of MRI scans from seven liposarcomas (three well-differentiated, two myxoid, two pleomorphic).
- Assessment of tumor size, location, margination, signal characteristics (T1, T2-weighted images), and post-contrast enhancement patterns.
- Correlation of imaging findings with histopathologic diagnoses.
Main Results:
- All liposarcomas exhibited well-defined, lobulated margins.
- Well-differentiated liposarcomas were predominantly fatty, hyperintense on T2-weighted images, with minimal enhancement.
- Myxoid liposarcomas showed homogeneous to mildly heterogeneous patterns, while pleomorphic types were markedly heterogeneous.
- Myxoid and pleomorphic liposarcomas demonstrated moderate to marked heterogeneous enhancement post-contrast.
Conclusions:
- MRI can differentiate liposarcoma subtypes based on imaging characteristics.
- A predominantly fatty appearance suggests well-differentiated liposarcoma.
- Increased internal heterogeneity and contrast enhancement correlate with higher malignancy grades in liposarcomas.