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. 2017 Jan-Feb;50(1):48–54. doi: 10.1590/0100-3984.2016.0020

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This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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A 21-year-old woman with tuberous sclerosis complex and multiple renal angiomyolipomas. T1-weighted in-phase gradient-recalled echo image (A) shows a hyperintense right renal mass (arrow). T1-weighted opposed-phase gradient-recalled echo image (B) shows a peripheral India ink artefact at the fat-water interface between the mass and surrounding normal renal parenchyma, a finding diagnostic of lipid-rich angiomyolipoma. T1-weighted fat-suppressed image (C) shows diffuse intralesional low signal intensity in the lipid-rich angiomyolipoma. Note also a lipid-poor angiomyolipoma in the right kidney, appearing as a hyperintense nodular lesion in (A) (arrowhead) and presenting homogeneous internal signal loss in (B) (arrowhead) due to the presence of microscopic amounts of fat within the lesion.