CT and MRI features of myxoid liposarcoma

Xu Bin Li, Yan Hou, Zhao Xiang Ye

    Research output: Contribution to journalArticle

    Abstract

    Objective: To investigate the CT and MRI features of myxoid liposarcoma. Methods: CT and MRI manifestations of 24 patients with myxoid liposarcoma confirmed with pathology were reviewed retrospectively. Eighteen patients underwent plain CT, and 9 of them also underwent contrast-enhanced CT scan. Six patients underwent plain MR, and 5 of them also underwent contrast-enhanced scan. Results: All lesions appeared as unilateral nodule or mass. Twelve tumors occurred in the lower extremity (n=12), particularly in the thigh (n=9), and then in the retroperitoneum (n=7). Among 14 extremity tumors, 10 occurred in the intermuscular fascial planes or deep-seated areas, 2 in the muscles and 2 in the subcutaneous tissues. The lesions appeared regular in 15 patients with well-defined margins, while irregular in 9 patients with ill-defined margins. The mean maximum diameter of the lesions was (12.5±8.0)cm (ranged from 2.0 to 38.0 cm). The average CT value of the lesions was (19.4±6.8)HU (ranged from 11.0 to 30.0 HU) on plain CT images. On T1WI, all 6 tumors showed predominant isointense or slightly hypointense signals relative to muscles, with 2 having amorphous foci of high signal intensity. On T2WI, the major portion of tumors in 4 patients displayed hyperintense signals compared with fat with slightly hyperintense areas and (or) linear hypointense signals, and the tumors in 2 patients showed remarkable homogeneous hyperintense signals. Fourteen tumors showed intense heterogeneous contrast enhancement. The average CT value of the intense enhanced-areas in the tumors was (62.7±27.0)HU (ranged from 35.0 to 112.0 HU) on enhanced CT images. Conclusion: CT and MRI features of myxoid liposarcoma are distinctive to some extent, including predominant low attenuation on CT images, low signal intensity on T1WI, marked high signal intensity on T2WI with slightly hyperintense areas and (or) linear hypointense signals, as well as intense heterogeneous enhancement.

    Original languageEnglish (US)
    Pages (from-to)628-631
    Number of pages4
    JournalChinese Journal of Medical Imaging Technology
    Volume29
    Issue number4
    StatePublished - Apr 1 2013

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    Keywords

    • Liposarcoma, myxoid
    • Magnetic resonance imaging
    • Tomography, X-ray computed

    ASJC Scopus subject areas

    • Radiology Nuclear Medicine and imaging
    • Physiology (medical)

    Cite this

    Li, X. B., Hou, Y., & Ye, Z. X. (2013). CT and MRI features of myxoid liposarcoma. Chinese Journal of Medical Imaging Technology, 29(4), 628-631.