術前診断にCTとMRIが有用であった縦隔原発の脂肪肉腫の1例

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  • A case of Liposarcoma in the Mediastinum Diagnosed Preoperatively by CT and MR Imaging

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Background: Primary mediastinal liposarcoma is rare. We report a case of liposarcoma diagnosed preoperatively by computed tomography and magnetic resonance imaging.<BR>Case: A 59-year-old man with an abnormal shadow on chest X-ray and complaining of hoarseness was referred to our center for further investigations and treatment. The chest X-ray showed enlargement of the right upper mediastinum and leftward shift of the trachea. Contrast-enhanced chest computed tomography (CT) demonstrated a tumor with fatty density extended from the upper mediastinum to the right side of the neck, containing a heterogeneously enhanced area in the right subclavicular region. Magnetic resonance (MR) imaging of the tumor showed the same signal intensity as fatty tissue in the posterotracheal region and a slightly lower signal intensity in the cervical region. The differences of signal intensity were considered to reflect the difference in the fat component content. The tumor in the right subclavicular region, which showed a high signal intensity on the T2-weighted image, was considered to be myxomatous. The pathological diagnosis was mixed-type liposarcoma composed of well-differentiated and myxoid area.<BR>Conclusion: CT and MR images were useful in the diagnosis of mediastinal liposarcoma and corresponded well with the pathologic findings.

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  • 肺癌

    肺癌 39 (7), 1025-1030, 1999

    特定非営利活動法人 日本肺癌学会

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