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Renal angiomyolipoma incidentally discovered in a 66-year-old woman at CT enterography performed for gastrointestinal bleeding. Axial (a) and sagittal (b) contrast-enhanced CT images show a well-circumscribed fat-containing lesion (straight arrow) with thin internal septa and small blood vessels. The sagittal image best shows a subtle renal cortical defect (curved arrow on b).
