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胸部外科
Abstract
A 72-year-old woman was reffered to our hospital for further examination of a tumor shadow in theleft upper lung field which was detected in a mass screening chest X-ray. Computed tomography( CT)and magnetic resonance imaging (MRI) revealed a chest wall tumor located in the left 4th intercostalspace. The lesion was suspected to be neurogenic tumor and CT-guided needle biopsy was performed.The tumor was consisted of spindle-shaped cells, but immunohistochemistry demonstrated no evidenceof neurogenic tumor. As a possibility of malignant tumor could not denied, we performed tumor resectionunder video-assisted surgery. The lesion was not originated from nerves, but adhered to the intercostalmuscle. Histologically, the tumor was consisted of spidle-shaped cells without atypia whichsparsely proliferate in the myxoid stroma adjacent to intercostal muscle. In immunohistochemistry,tumor cells were positive for vimentin, and negative for desmin, S-100 protein, smooth muscle actin,CD34 and factor Ⅷ. It was diagnosed as intramuscular myxoma. This histology in the intercostal muscleis extremely rare.
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