Angiomyolipoma Mimic

A 7.5-cm mass at the upper pole of the right kidney (Fig 1) was incidentally discovered in a 48-year-old woman and was believed to represent a renal angiomyolipoma. On the pre-embolization computed tomography (CT) angiogram, a bilateral adrenal-renal fusion (i.e., anomalous, incomplete encapsulation of the adrenal gland and kidney during embryogenesis) was noted. On coronal images (Fig 2), the mass appeared to arise from the kidney, but sagittal images (Fig 3) suggested an adrenal origin. Angiography demonstrated that the mass was supplied by branches of the superior suprarenal artery (Fig 4), confirming the diagnosis of adrenal myelolipoma, as angiomyolipomas receive their blood supply from branches of the renal artery.
Source: Journal of Vascular and Interventional Radiology : JVIR - Category: Radiology Authors: Tags: Images in IR Source Type: research