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.

1. Antonio Pio Masciotra
Campobasso – Molise – Italy
Website www.masciotra.net
YouTube Channel
https://www.youtube.com/channel/UCgCj21nKGAhR997Ia3-QegQ
A clinical case of renal angiomyolipoma
 50 years old woman with a breast cancer at her first abdominal US in the initial staging of her disease

5. Renal Angiomyolipoma
Feature AML Cortex Medulla
Mean stiffness (kPa) 25.7 17.0 27.9
Ratio AML/Cortex 1.5
Ratio AML/Medulla 0.9

6. CT an MRI usual
features of
angiomyolipoma

7. Pathology usual
features of
angiomyolipoma

8. Myoid cells with
clear cytoplasm
spinning off of large
vessels in a
background of
mature fat: the
classic microscopic
features of
angiomyolipoma.