A 50-year-old woman undergoing an abdominal ultrasound for breast cancer staging was found to have a renal mass. Computer tomography and magnetic resonance imaging confirmed features consistent with renal angiomyolipoma. Biopsy of the mass showed the classic microscopic pathology of angiomyolipoma, with myoid cells and mature fat tissue surrounding large vessels. Elastography found the mean stiffness of the angiomyolipoma to be similar to renal cortex but less than the renal medulla.