Fig. 3: Angiomyolipoma: US features a. Longitudinal sonogram of right kidney showing a well defined homogeneously hyperechoic lower polar mass without perilesional halo or intralesional cystic areas, suggestive of angiomyolipoma. b. Color Doppler image of an angiomyolopoma. Spectral wave analysis showing a peak systolic Doppler frequency shift less than 2.5 KHz.