臓側胸膜由来のｓｏｌｉｔａｒｙ　ｆｉｂｒｏｕｓ　ｔｕｍｏｒの１例

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  • A CASE OF SOLITARY FIBROUS TUMOR (SFT) OF THE VISCERAL PLEURA

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A 39-year-old man was admitted to our hospital because of a tumor shadow in the left lower lung field. CT scan and MRI revealed a mass with well-defined margins and smooth contours contacting the left antero-lateral chest wall. The tumor was diagnosed as a solitary fibrous tumor (SFT) arising from visceral pleura, because it moved with respiratory movement. Thoracoscopic surgery was performed, and a smooth pedunculated tumor was removed. The tumor originated from the visceral pleura of the left upper lobe and was 3.2×1.8×4.2cm in size. Histologically, the tumor was predominantly composed of a random proliferation of spindle cells, intimately admixed with collagen. Immunohistochemical analysis showed that the tumor cells were positive for vimentin and CD34, but negative for keratin, and the tumor was diagnosed as SFT. SFT is a rare tumor that most commonly arises in the pleura, and is thought to originate from mesenchymal cells. Thoracoscopic surgery is useful for the resection of such pedunculated SFT.

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