A case of posterior mediastinal myelolipoma

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  • 後縦隔に発生した骨髄脂肪腫の1例

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Abstract

<p>A 69-year-old man with cold symptoms was found to have a tumor in the right posterior mediastinum and was referred to our hospital. A chest radiograph and CT revealed a well-circumscribed mass with a smooth surface adjacent to the right side of the tenth thoracic vertebra. This tumor had not changed in size for five years and showed no activity on FDG-PET. Extirpation under video-assisted thoracoscopic surgery was performed for the preoperatively suspected neurogenic tumor. The soft, dark-red tumor was completely resected. Histopathologically, the tumor was composed of hematopoietic cells and mature adipocytes, and was diagnosed as myelolipoma. In this case, it was not easy to distinguish myelolipoma from extramedullary hematopoiesis because of the clinical aspects of anemia and splenomegaly. To make a confirmative diagnosis, postoperative bone marrow biopsy was performed to demonstrate normocellular marrow without any atypical cells.</p>

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