[A case of adrenal myelolipoma]

Adrenal myelolipoma is a rare, nonfunctioning, and benign tumor composed of varying proportion of fat and bone marrow elements. A case is presented of a thirty-six-year-old woman in whom the diagnosis of adrenal myelolipoma was suspected preoperatively by ultrasonography, computed tomography, and magnetic resonance imaging (MRI). The patient cured by surgery. Histological examination showed mature adipose tissue and normal hemopoietic tissue. This is the first report which describes MRI of adrenal myelolipoma in Japan.