Renal angiomyolipoma not associated with tuberous sclerosis

Six cases of renal angiomyolipoma not associated with the tuberous sclerosis complex illustrate the common presenting clinical picture of this relatively rare hamartoma. The authors discuss the traditional and newer diagnostic studies used, particularly ultrasonography and computerized axial tomography and their applications in the diagnosis of angiomyolipoma. Special emphasis is placed on differentiation of renal angiomyolipoma from renal cell carcinoma. Although the newer imaging techniques are valuable diagnostic aids, treatment of these renal mass lesions should not be based entirely on results of such studies.