Figure 11b. Massive right renal angiomyolipoma with hemorrhage in a patient with tuberous sclerosis several years after left nephrectomy. (a) Axial unenhanced CT image shows a huge heterogeneous mass of predominantly fat attenuation replacing the right kidney (arrows). The kidney itself is virtually unrecognizable. (b) Axial CT image obtained inferior to a shows a nodular area of high attenuation (arrow), which is suggestive of hemorrhage. Note the surrounding hemorrhage on both images (arrowhead in a, arrowheads in b).