Spontaneous regression of an invasive thymoma |
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Authors: | Yojiro Yutaka Mitsugu Omasa Kei Shikuma Masato Okuda Toshihiko Taki |
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Institution: | (1) Respiratory Disease Center, Division of Thoracic Surgery, Kitano Hospital Medical Research Institute, 2-4-20 Ogimachi, Kita-ku, Osaka 530-8480, Japan |
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Abstract: | Although there are many reports of spontaneous regression of noninvasive thymoma, there are no reports of spontaneous regression
of an invasive thymoma. Moreover, the mechanism of the spontaneous regression is still unknown. The present case concerns
a 47-year-old man who presented with chest pain. Computed tomography (CT) showed a large anterior mediastinal mass with left
pleural effusion that occluded the innominate vein. The tissue obtained by video-assisted thoracic surgery suggested a diagnosis
of invasive thymic carcinoma. One month later CT showed prominent regression of the tumor, and the tumor was completely resected.
On pathology, the diagnosis was thymoma type B3. |
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Keywords: | Spontaneous regression Thymoma Sclerosing thymoma |
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