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  • Title: Liposarcoma of soft tissue: MRI findings with pathologic correlation.
    Author: Arkun R, Memis A, Akalin T, Ustun EE, Sabah D, Kandiloglu G.
    Journal: Skeletal Radiol; 1997 Mar; 26(3):167-72. PubMed ID: 9108227.
    Abstract:
    OBJECTIVE: To evaluate the MRI findings of liposarcomas of different histologic types and correlate these with the histopathologic features. DESIGN: The MR images of seven liposarcomas were reviewed retrospectively to assess the tumor size, location, margination, signal characteristics and enhancement patterns in different histologic types. PATIENTS: Seven liposarcomas comprising three well-differentiated, two myxoid and two pleomorphic types were evaluated. RESULTS AND CONCLUSION: All tumors showed well-defined and mostly lobulated margins. The well-differentiated liposarcomas were composed mainly of fat with septations or nodules, were hyperintense on T2-weighted images, and demonstrated faint enhancement or no enhancement following intravenous contrast. Myxoid liposarcomas were homogeneous or mildly heterogeneous and a pseudocapsule was present in one case. Pleomorphic types showed a markedly heterogeneous internal structure. Both myxoid and pleomorphic lesions-showed moderate or marked heterogeneous enhancement after contrast administration. Well-differentiated liposarcomas may be differentiated from other types of the tumor by their largely lipomatous appearance. The malignancy grade increases in parallel with tumor heterogeneity and contrast enhancement.
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