Bilateral Posterior Mediastinal Primary Myelolipoma.

Myelolipoma is an uncommon benign mesenchymal tumor consisting of mature adipocytes and hemopoietic elements that is mostly found in adrenal glands. Bilateral posterior mediastinal primary myelolipoma manifests extremely rarely, and only 11 such occurrences have been previously described. With no definite symptoms, pathologic evaluation is essential for diagnosis. This report presents a case of a 63-year-old man with a diagnosis of bilateral posterior mediastinal primary myelolipoma on the basis of radiologic findings who underwent surgical resection by video-assisted thoracic surgery. The aims of this report are to show the diagnosis of an unusual mediastinal lesion and improve understanding of this disease. (C) 2018 by The Society of Thoracic Surgeons