[A case of adrenal myelolipoma]

A case of myelolipoma of the right adrenal gland is reported. A 43-year-old female was admitted to our hospital, Department of 1st Internal Medicine, because of acute hepatitis. CT incidentally showed a well circumscribed mass, as an area of low density, arising from the right adrenal gland. Although sonography showed a markedly echogenic tumor, it was not visualized on the angiogram. Results, of hormonal examinations, were unremarkable except for low levels of ACTH. We confirmed a myelolipoma of the right adrenal gland, and performed right adrenalectomy. The tumor was 65 x 50 x 35 mm in size, 95 g in weight. Pathology disclosed an admixture of mature adipose tissue and hematopoietic elements resembling bone marrow.