[Primary Myelolipoma of the Posterior Mediastinum:Report of a Case].

The patient was a 66-year-old male. Computed tomography( CT) scan revealed a tumor of the posterior mediastinum 2 years before and grew slowly 49.0 to 51.4 mm in the longest diameter of the coronal slice. Thoracoscopic surgery was performed to resect it. The pathological examination revealed a predominantly mature adipose tissue with hematopoietic tissue in hematoxylin and eosin( HE) staining and the hematopoietic tissue was comprised of mature erythroblasts, megakaryocytes, and granulocytes in immune staining, which diagnosed it as myelolipoma. Incidence of myelolipoma which originates from besides adrenal glands is reported 0.08 to 0.2%. As far as we can search, 40 cases of myelolipoma of the posterior mediastinum are in the literatures.