Mediastinal Giant Leiomyosarcoma; a case report.

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We present a case report of very rare mediastinal leiomyosarcoma, describing mainly its diagnostic imagings. A 69-year-old-woman was admitted for dyspnea on exertion and an abnormal shadow on chest X-ray. The chest X-ray showed enlargement of the mediastinum and right pleural effusion. Chest computed tomography and magnetic resonance imagings showed a well-defined huge expanding tumor like a snowman in the middle and posterior mediastinum. As the tumor was non-homogeneously enhanced with contrast media, soft tissue sarcoma such as malignant schwannoma or leiomyosarcoma was suspected. As the symptoms, such as dyspnea, progressed rapidly, surgical treatment was immediately performed. Dyspnea improved after the en-bloc resection of the tumor, and the histological diagnosis was leiomyosarcoma based on immunohistochemical and electron microscopic findings.
特定非営利活動法人日本肺癌学会の論文