In a recent review of 24 cases of renal leiomyoma, 15 were reclassified as angiomyolipoma, myolipoma
, or medullary fibroma .
1) According to histopathological findings, they are sub classified into conventional lipoma, fibrolipoma, angiolipoma, fusiform cell lipoma, myolipoma
and pleomorphic lipoma.
Of these tumors, adrenal adenoma and adrenal myolipoma
contain a fat component and can be differentiated on MRI.